Aquaponic Growth Explosion

Hello viewers!

It has been a while since I have updated, my computer broke. But... now I am back and ready to update! I wish I could have shown the progress of my tomato plant, however I can show you how it is now! It is IMPRESSIVE! Everyone who sees it is astonished. Even if it is only been three days, they can see a big difference. My fish are also going great. They are growing and I actually had to sell a few because they were getting big and territorial.

Having African Cichlids makes my system different from other aquaponic systems. African Cichlids seem to have more personality and behavioral habits. They are fascinating to to watch once you know what they are doing. They can also change color or more like hues and color intensity depending on how they are feeling.

For example I have noticed that the dominant males tend to show off their colors for the females 15 or so minutes after they are fed. There are also relationships between certain fish that can be seen day after day. Some are scared of others, some are couples, and then some are friends or tend to stick together.

Enough chit chat :) here are some pics

Massive growth from the tomato plant.
Blueberry bush doing okay after transplant 

My first tomato plant!

Tomato plant after topping.

Blueberry bush after transpplant.

My blueberry bush is recovering from the transplant shock and it starting to grow... kinda. One of the first things I learned while reading Aquaponic Gardening was that blueberries do not do well in aquaponics. I should have read up on them before I bought them. The reason is they thrive in a more acidic soil / media.m My aquaponics has a PH bit other 7. I would guess 7.4 or so. While this is a tad higher than the suggested aquaponic PH level, my Cichlids come from Harder water so it is a compromise. I may have problems with low iron levels later on but i will fix that when the time comes... IF it ever comes!

As you can see, my ruccola isnt doing that well. I think if I want to continue with the DWC (Deep Water Culture) I will have to hook up some lights to it. I am toying with the idea of converting it to another flood and drain, media bed because my other one is just doing so well!

Arugula needs more light than the window provides.
I will need to add lighting if I wish to continue growing arugula
and other salad greens.

Fish looking for some grub

A group shot of my cichlids. From Left; Nimbochromis Venustus,
Placiachromis Milomo, Red Empress

Nimbochromis Venustus

Lastly, but very importantly... I would recomend everyone interested in Aquaponics to read Sylvia Bernstiens book,  Aquaponic Gardening: A Step by Step Guide to Growing Fish and Vegetables Together.

I am not all the way through it, but I have learned a decent amount already. I wish I had this book a few months back though. Instead of reading forum after forum, blogs and dozens of YouTube videos, you can just read this book instead. It has everything you need to know and in simple and easy to understand language. It is written in a way that you need a bit of your own creativity, but Aquapons (as we are called, I guess) tend to be creative and DIY folk, my kind of folk ;-) 

Until next update!

Felix

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Growth Update

Howdy Folks,


My arugula plants are growing like crazy! I tried to take a picture of the roots growing, but my phone camera is not very good. Its a shame too. The roots are at least 5-8 cm on all of the net pots.

My heirloom tomato is still being a beast! Growing super fast. I hope that I will get some tomatoes form the plant but I am not sure if it will self pollinate or not. But I will find out :) From my reading most tomato plants will self pollinate because they have both male and female parts. Might be different from heirloom tomatoes though. I try to self pollinate the flowers by rubbing my finger on each flower and trying to act like a busy bee, spreading the pollen.

Here is what you came to see. Pics!

The roots are taking off!

The roots will grow and hang in the oxygenated rich water.

Lots of room for more net pots and more veggies!

Tomato plant loving its aquaponic home

Stay tuned for another update soon!

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Commercial Backyard Aquaponic System Wolf Pack Aquaponics

Wolf Pack Aquaponics

When people get into aquaponics, they usually get the idea of setting up a big system in their backyard. While there are plenty of factors that halt their idea, cold climates, lack of funds, a nagging wife/ girlfriend who does not want an ugly system in their yard, etc. But nothing stopped the Wolf Pack Aquaponic crew from setting up their backyard system. 

The tour started off with the water collection system that can collect over 300 gallons every time it rains one inch! The tour continued to the back side where there was eight or so 300 gal IBCs with half 275 gal grow beds on top. There is currently only a lonely blue gill swimming around, but once summer comes again they will be filled with home grown tilapia. Each grow bed fills and drains via an auto-siphon into the fish tanks below. Each IBC is connected with each other with a four inch PVC pipe so the fish can swim from one container to another. 

Inside the Wolf Pack Aquaponic greenhouse.

Inside the greenhouse there are IBCs on each side, but you barley notice them as IBCs. They are tastefully covered and look great! There are lots of plants growing but most have been harvested for the winter. One cool thing is the whole system is run off of one hot tub heater. This includes all the IBCs outside too! The pump doubles as a heater too, keeping the water temp suitable for tilapia. The pump does have a draw back, the cost of running it. It costs about $2-$3 a day just to run the heater pump. Although it does not sound that high, consider the pump is running 24/7, 365 days a year. That is $730 to $1,095 a year just to run the heater pump. Plus you need to factor in the cost to run the air compressor that provided air to each and every fish tank and DWC grow bed. 

These are the floating raft beds (DWC).
This is where they start seedlings for transplant.

The fish tanks that lead to the floating rafts are filtered with a swirl filter. A swirl filter skims clean water off the top of the container while the heavy solids "swirl" to the bottom, also called a vortex filter. All of the solid fish waste that is collected is used as fertilizer for the "traditonal" garden outside. The plants love it! There were more tomatoes then they could eat, and pole bean galore! 

While the system is just feeding the Wolf Pack family for right now, they have plans to expand and have different offers that they are entertaining. There is lots and lots of work that went into making this system as well. The knowledge is being kept and collected to share with the public in the future. A "this works and this doesnt" manuel for aquaponics. 

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Is Aquaponics Truly Sustainable

This are the things that had always been in my mind. Is aquaponics truly sustainable and green? There are few critics towards aquaponics that yet has to be answered by us the aquaponics enthusiast:

1. How could aquaponic be considered green provided it is powered by electricity. All of us know, our source of electricity power mostly comes from fossil burning that release carbon to the atmosphere. Thus makes aquaponics indirectly contribute to the release of unnecessary carbon compound into the atmosphere.
2. Most materials used for the construction of aquaponics actually is not truly green and sustainable. We all know, the grow bed is made of plastic, metal or wood (which sacrificed valuable commodity of the environment), PVC pipe, synthetic glue. These products that we used to construct aquaponics produced in factory that releases those unnecessary gases to the environment.
3. Some space required for aquaponic setup. It do consume the "fertile/non fertile" top soil. However being a person with green mind, we all do appreciate the value of the top soil, since we all know there are many ways to revive its usefulness and fertility. Since aquaponics located and covered the top soil with concrete, cement, tank or whatever, then how could it considered to be green, whereby the space used could be utilized to a greater value for the environment. Therefore, optimizing the usefulness of space also becomes an issue.

These are the things that we have to answer. It is not enough for us to justify how green and sustainable aquaponics are. The answer lies on our actions and creativity to make it truly sustainable. Aquaponics still has long way to go. However, I believe with our determination and effort to thinks and think, we definitely someday will find a way for aquaponics to make its way as a green and sustainable endeavor in food production.

I am really optimistic to see aquaponics will become one of the solution to the catastrophic environment that we faced today, "Food Shortage". I want to see my aquaponics set. Maybe I should ask my brother to email me 2 or 3 recent pictures of our aquaponics at our home.

"Peng tolong dulu ba kunun kasi email saya gambar latest aquaponic di rumah kalau ko balik nanti, hihi XD"

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Moving to town

Recently we have moved to town.  We had to sell the property for a number of reasons.  I will miss a lot of things about the property but unfortunately selling was the right thing to do at this point in time.  We are now renting a nice house in town.

Moving to town has been difficult, we have had to sell our animals and alpacas and they are sorely missed.  Our daughters were born in our old house and I developed Immali corn and a few other varieties of vegetables there.  It has a lot of memories and moving was far more difficult than I thought it would be.
In our last few days someone stole our firewood and someone else broke into the mud brick house and cut/took the antenna cables (yet didnt steal anything).  We know who did both of these things but unfortunately can do little about it.  That made moving even harder and more emotional.  I have been praying that I can forgive them, yet I find this very difficult.

Babingtons leek flowering after the move

We have also been very lucky, we asked our new landlord if we could keep two guinea pigs and he allowed us to keep them.  This has made the transition far easier for the kids and they often sit outside holding and patting the guinea pigs.  I think guinea pigs are amazing little animals and very under-appreciated pets.  I should write a post on guinea pigs at some point.

We also asked if we could keep some chickens and the landlord graciously agreed.  I truly appreciate being allowed to keep them.  This has been great as we still have eggs.  It has been many years since we have had to buy eggs and I dread the thought of that ever having to buy them again.  I dont have a rooster so will not be hatching any eggs in the immediate future.

Araucana cross and silkie cross chickens

We took our last two sheep to the butcher and they are now in the freezer so we will not have to buy meat for some time.  I doubt we will be growing our own meat here in any way.  Perhaps I will get some quail or be able to set up a small aquaponics system and raise some edible fish when we move next.

This rental house is very nice and the street is pleasantly quiet, but it does not have a vegetable garden.  I dont understand how people grow food without a vegetable garden.  I am at a loss here.  I guess they pay someone else to grow all their food and simply buy it from a supermarket?  That seems odd to me.  There are so many things that I like to eat which I can not get from a store, other vegetables are so much better fresh.  What I would give for even a tiny plot.  They are a bit precious about grass here so I can only grow things in pots which I have to keep on concrete or pavers in fear of damaging the lawn.

Vegetables but no land in which to plant them

The same vegetables from the other end

Duck potatoes, they grow well in a bucket

I dug up some of most types of vegetables/herbs and brought them here with us.  I could not take many of each, just enough to start again.  Some things do well in containers, others do not.  Many plants have died in the move and many more are looking weak.  I hope that we get to move somewhere with a vegetable garden before many more things start to die.

Micro Tomatoes - unfortunately not all survived the move

Chilli seedlings from rare imported seeds

When I get set up somewhere with a vegetable garden I plan to grow and sell vegetables and seeds again.  I miss having a garden.  I may have some Babingtons Leeks and perhaps some other things things for sale soon but cant get too serious or have too many spare plants when growing in pots.  When I do start to sell vegetables again I will list them on my For Sale page.

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Aquaponics Lets Get Started

It has bee a long time ago I have dreamed to start my own aquaponics set. Finally, during the last semester break of my teaching course, I have stepped for the first time into this green endeavor.

I made the setup simple. Grow bed from plastic basin and sea shell obtained for free, PVC pipe, Mr. Affnans Siphon Principle using recycled bottle, aquarium pump (though the flow rate insufficient creating problem in producing siphon effect), and lastly, our old dormant brick fish pond which has been brought back to life.

All of these things were incorporated and this is the result. Take a look and enjoy :)

There are Kangkong, Lemon Grass, Ulam Raja, Tomato, Sawi, Long Bean and Onion

Sawi, just come out

Tomato

Long Bean

Onoin

Water inlet

Water outlet

Fish pond

Overall view of the set

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The effects of static magnetic fields on seed germination and plant growth

I have heard anecdotal evidence from people who claim exposing seeds to a static magnetic field increases germination rates and makes seeds germinate a lot faster.  I have heard other people claim that exposing seedlings to a magnetic field increases health of young seedlings.  To be honest I had no idea if this was accurate or not.  If this is true then I want to use magnets in germinating some seeds.

I did some research on the internet and found various papers that have been written on the subject, they appear to have conflicting results and many of the tests were often run is sub optimal conditions (often funded by companies that have a conflict of interest) with far too many variables often in completely non-scientific ways that can not be used to provide unbiased results.  Most (ie all) of the people who I know of that have tried this have not included a control, which in my mind is a waste of time.  I often read statements such as "try this and you will be amazed by the results", so I decided to try it.

To find out for myself if there is truth in this my children and I decided to run a small experiment.  If static magnets do increase the germination rates of seeds (which would be great for old seeds with low germination rates), or decrease the amount of time it takes for seeds to germinate (which would stop weaker seeds from rotting), or increases the vigor of young seedlings (which can die in the first few days while they are tiny) they could be extremely useful for me in germinating difficult seeds or very old seeds of rare varieties.  Lets face it, if this works I have a lot to gain and nothing to lose.

The three pots, unfortunately one was a different colour

The Experiment
I will probably try to write this up properly some time in the future, include some graphs of the results and try to submit it to some journal for peer review, but I dont have time right now.  For now I will write it up very simply so that you can see what happened and possibly repeat it with your own kids.

This experiment was conducted to determine if a static magnetic field would affect seed germination or the early growth of seedlings.

This study divided wheat (Triticum spp) seeds into three groups.  Each group was comprised of 100 wheat seeds randomly chosen from a sack of feed wheat.  The first group was to germinate in the presence of a strong static magnet field delivered from a Neodymium magnet (approximately 0.6751 tesla).  The second group was to germinate in the presence of a weak static magnet field delivered from a small refrigerator magnet of unknown strength.  The third grew was to germinate in the absence of any added magnetic field to act as a control. 

Several growth parameters were observed throughout the experiment including the germination rate, leaf length, and root length.  In addition the health status of seedlings was measured through observation of leaf color, spots, visual presence of disease, stem curvature, and seedling mortality.  Plant growth was observed continuously for the duration of the experiment.

Three square 10cm plastic pots were filled with potting soil from the same bag to the same depth.  The three pots were watered by submerging the pots in water until the soil was thoroughly soaked.  Each pot was then surface sowed with 100 wheat seeds.  For the duration of the experiment each pot was watered from below once a week so as not to disturb the magnets or the emerging seedlings.  Each magnet was wrapped in a single sheet or 3 ply toilet paper inside a small plastic zip lock bag and placed on top of the seeds.  This was done to protect the magnets from corrosion as well as obscure which magnet was in which group.  To reduce the presence of any variables the control had a small non magnetic stone of similar weight to the magnets, wrapped in toilet paper inside a small plastic zip lock bag.  The three bags were then shuffled and chosen at random to be placed on the seeded pots of soil to ensure a blind test.

The magnets were placed on their side so that some seeds would be close to the North pole, some close to the South pole and others along the edge.  This was intended to show if either pole had a positive or negative effect on germination of the seeds.

After 5 days seeds in all three pots began to germinate.  It appeared as if seeds from all parts of all pots were germinating at the same rate.  It appeared that all three pots had similar germination in terms of the number of seeds germinating, progression of root growth, progression of leaf growth, as well as angle of root or leaf growth.

After 14 days seedlings from all three pots were counted and measured.  Seedlings from all three groups had similar height, similar health as indicated by colour, lack of spots, and visual stem curvature.  All three groups had no seedling mortality throughout the duration of the experiment.

The high magnetic group had 98% germination.

The low magnetic group had 100% germination.

The control group had 99% germination.
The time to germination from all three pots was identical which indicates that magnets have no noticeable effect on germination time.

In addition to the germination rates being similar (98% to 100%), the leaf length, root length and health of seedlings from each batch appeared to be identical.  I had planned on weighing the seedlings from each group to determine fresh biomass but discovered that separating the roots from the potting mix was not possible.

A blind test, I didnt know which pot has the magnet or stone

The results from this small experiment indicate that there is no noticeable effect on the germination of seeds in terms of germination time or germination rate due to either strong or weak static magnetic fields.  It appears that a static magnetic field has no noticeable effect on the vigor/health of young seedlings.  The pots with magnets had similar looking seedlings growing on all areas of the pot which indicates that the polarity of the magnet also had no noticeable effect on germination or early growth.

This was a blind test and it was not until after the seedlings were counted and measured that I opened the little zip lock bags to discover which pot had which magnet.  I figure if this was worth doing it was worth doing properly.


My thoughts
While I was kind of disappointed by this result in hindsight it is not overly surprising.  If any positive difference would be seen then seed magnetisation would be used by commercial farmers.  Farmers have tight profit margins and often grow in hostile environments, they are willing to do whatever it takes to make their crops thrive and magnetisation would be reasonably cheap and simple to apply.  The fact that seed magnetisers are only seen being sold by a few sketchy online sellers and are not seen in rural stores or used by many commercial farmers hints that it may not be all that useful.  It was still worth testing to see for myself.

I have already started to run a similar experiment again and changed some of the parameters, the use of sand instead of soil will allow me to weigh the fresh or dry biomass and see if there is any difference there.  An extra 100 seeds in each group is only going to make the data better.

I am using seeds from a dicot instead of a monocot to see if that makes any noticeable difference.  Doing this experiment using seeds with naturally high germination rates as I did possibly obscures the results as germination rates could not really get any higher.  The seeds in the second test are older and have lower germination rates so I should be able to see if the magnets make any noticeable difference on germination rates that are not close to 100%.

I am also planning to grow seedlings for a longer time to see if any noticeable difference is made as they get larger, in the future I may even grow them to maturity to determine if any difference is made to overall yield or time to maturity (Micro Tom tomatoes seem like a great choice for this).  There are also a few other things that I may considering trying in the future that may make the experiment a little more robust.

Micro Tom tomatoes, tiny plants with a short lifecycle makes them ideal for experiments

When I conclude this second experiment I plan to post the results (or a link to the results) here.

If you also try this little experiment please ensure you are removing as many variables as possible and do it as a blind test with a control so that the results are accurate.  Feel free to let me know your results.

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I repeated the experiment using some old cress (Lepidium sativum) seeds that would have a lower percentage of germination and I grew them out for a bit longer.  Again I used 100 seeds per group but this time all of the pots were exactly the same.  

The time to germination was identical in all groups.  The plants in all groups looked similar in terms of height, number of leaves, colour, angle of leaf growth etc.  The motality rate was identical in all three groups (4 seedlings germinated then died in each group).  I did not weigh the seedlings as I assume they would weigh less than 1 gram collectively and my scales are not accurate enough to record any differences.  Due to less than ideal conditions all 3 groups then started to grow mould which infected all seedlings similarly and all plants are succumbing at a similar rate.  I am going to let this continue to see if there is any noticeable difference in the groups but at this stage that looks unlikely.

The percentage germination was the only area where I could see even a slight difference.  The control group had 24 seeds germinate, the strong magnet had 22 seeds germinate and the weak magnet had 30 seeds germinate.  

This is certainly not the miracle difference in growth and/or germination that I had hoped for, it is not going to be the magic bullet to help germinate tricky or weak seeds.  The difference between 24% germination of the control and 30% germination for the weak magnet is not enough for me to think that the magnets are creating a difference of any kind.

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If it is worth doing it is worth doing right. 

Some people have asked me why I only have 100 seeds in each group.  The answer is because if I have any more seeds they are too far from the magnet to experience the magnetic field.  I agree this test would be more valid with larger numbers, to help overcome this I have run the experiment several times using several different species to see if I obtain any significant difference.

I repeated this again with some older garlic chive (Allium tuberosum) seeds that I had left in a paper bag.  As the seeds were aging I had expected germination rates to be low. 

I used 100 randomly chosen seeds in each pot and used three identical pots filled with sand.  Again I used the strong magnet, the weak magnet and the non magnetic stone as a control.  As before I did not know which group was which until after I had counted the seedlings.

The time to germination was identical in each pot, the health and size of seedlings in each pot was also identical.  The early growth rates of the seedlings was identical.  I tried to weigh the seedlings after the experiment but my scales were not accurate enough to record any differences.

The control group had 64 seeds germinate, the weak magnet had 61 seeds germinate and the strong magnet had 65 seeds germinate.

Just like the previous experiments I am far from amazed by these results.  Their seems to be little to no effect of a static magnetic field, either strong or weak, on seed germination and early plant growth.

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From here I want to run this little experiment again using the Micro tomatoes from planting the seeds until maturity so I can count and weigh the fruit to see if there is any improvement in crop yield.  I will probably only be able to grow 3 seeds of each in this experiment as I do not have enough magnets to grow larger numbers. 

Due to moving etc I may not get around to this for some time though, if I do I plan to post the results here or if the results are interesting I may write another post and link to it from here.

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Green Festival Organic Sustainable Green Living

Its Summer Time!!!!!

And with summer comes all the green! This past weekend I attended The Green Festival at Navy Pier, Chicago. It was a fun time and there was lots to see! 

I was invited by my friend Alice to go as she had heard about it. When arriving, we donated canned food at the door and got our wrist bands for free. Thats is always a good start. We were greeted by the Cliff Bar booth and sampled all their products, delicious. 

While walking around sampling on all the free organic food samples, we found a couple cool booths. MyTerraceFarmer.com had a cool idea.

It was similar to aquaponics but not quite. They set up a small worm composting bin next to their drip irrigated "greenhouse." The composting bin is placed ontop on the water reservoir so the vermitea (worm tea, compost tea, etc.) dripped into it adding the nutrients. Very cool idea.

Another booth we spent some time at was the Tower Garden, made by JuicePlus+. We talked with two very passionate representatives from the company. 

The Towers they had growing were looking great. This Tower is actually the home garden of one of the reps! She brought hers in to show the systems potential. As you can see it does quite well. Inside the tower, there is a pump which makes it "rain" down on the roots. this allows for an even and often water supply. The plants love it and it does not take up too much floor space.

We took advantage of the beautiful day and walked along the bike path to Millennium Park. One of the reasons I love Chicago has to do with the public art, it is everywhere! And it is AWESOME!

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Raising Baby Tilapia Aquaponicly

Tilapia Fry

The Blackwell System recently had babies (fry)! There have been a few mothers holding eggs, but we never stripped them in time. This time was different, we were ready! 

We were trying an experiment with two mothers at the same time. Alex bought a small terrarium with a screen lid which was submersed into the large aquarium to make a small holding tank. With the two mothers holding eggs, we corralled one of the mothers into the holding tank. Our reasoning; the mother would spit the babies out and then we would release the mother back into the tank and keep the babies in the holding tank. The second mother fish would act as a control, to see how the babies survive (or dont) being spit into the tank directly. 

Things did not go as planned. On the third day, we went to check on the mother in the holding tank first thing in the morning. The mother was in there (where else would she go?), but she was definitely was not holding eggs any more and there was none in the tank. She ate them.

The control mother was still holding her eggs though. We had watched a movie on YouTube about stripping mother tilapia of their eggs the day before, and have decided to try and strip the control mother as we were tired of loosing babies. 

So we set up a bucket we could strip the mother in (that sound dirty!) and caught her in the net. While we where trying to get a good grip on her, she started spitting the eggs out! So we quickly got her in place and got all the eggs out. There were close to forty eggs and newly hatched eggs swimming and sitting in the bowl! It worked! 

We got a turkey baster and transported the eggs and newborns into a plastic vial. We strapped a fiberglass window screen on top so they cannot swim out and placed that under the grow bed drain. And there it hangs!

Water returning from the grow beds flows into the tube and replaces the water.
There are about 30 tilapia fry in the tube.

The fry are growing every day. After the eggs yolk sacks were gone, we have fed them crushed fish food. A good way to tell if fish are healthy is the food test. Fish that eat and have no physical symptoms are usually doing alright.

After they start to crowd this tube, which should not take long, the plan is to move them to the holding tank originally designed to house the holding mothers. The holding tank used to be resting on the bottom of the aquarium but too much fish poop was falling in it. It is now hanging kinda like the hatching tube but is semi-submersed.

Holding tank originally used to house tilapia mothers holding eggs.
When the fry are big enough they will be transferred to this tank.

Being able to strip the mother and raise our own babies has allowed us to close the loop in our system that can now be perpetual and not reliant on buying new tilapia after these ones... Well after these current fish make a tasty meal!

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Nitrogen Cycle and Moving Bed Filter

Nitrogen Cycle

Nitrogen Cycle

One of the most important concepts in aquaponics is the nitrogen cycle. Without a full understanding of it, you will not know "how" aquaponics actually works. But if you take a little bit of time to think about it, its not too hard. 

The fish produce waste, and there is usually some food floating around that does not get eaten. These two when let to sit in an aquarium, start to break up, and this creates ammonia. This is the first step in the nitrogen cycle. While ammonia starts the cycle, it is very dangerous and deadly to fish if the ppm (parts per million) gets too high.

The nitrogen cycle has two naturally occurring bacteria that do most of the work. The first bacteria to aid in the nitrogen cycle is nitrosomonas. This bacteria converts ammonia into nitrites. Fish can tolerate nitrites more than they can ammonia, but it can still be toxic to them. 

Nitrospira is the secnond naturally occurring bacteria that aids the nitrogen cycle. Nitrospira consumes the nitrite produced by nitrosomonas and produces nitrates as a byproduct. Nitrates are much safer for fish than either ammonia or nitrites. However if there is nowhere for the nitrates to go and they are not being consumed, it can kill your fish.

In a home aquarium, the nitrates are removed by doing water changes, or if there are plants in the aquarium, they will consume the nitrates, which is essentially plant food. 

In aquaponics, we not only grow veggies, fruits, and fish, we also cultivate these bacteria. Without nitrosomona and nitrospira, aquaponics would not work the way it does. We use their by-products to feed our plants so we do not need to add fertilizers. 

So the key to aquaponics is producing enough nitrates for your plants to grow, and having enough plants to consume the nitrates. While reading up on different filters for my aquarium (before I converted to aquaponics), I came across moving bed filters. 

Moving Bed Filter

A moving bed filter in short is a nitrate factory. It uses small filter media that have extreme amounts of surface area to catch all the bacteria that flow through the filter. The idea is very similar to the way aquaponics works. The filter media cultivate the same naturally occurring bacteria, nitrosomonas and nirospira. Theses filter the water like a mini nitrogen cycle. The filter media is designed to work best when they are moving around in the water, hence its name. 

Tilapia Approved! 

Moving bed filters use nontraditional filter media. Many products can be used but through my research I found that Hel-X. Hel-x has 40% more surface area than its competitors and comes in an array of sizes.  

Close up of Hel-X filter media.
The surface area on these are impressive!

Usually aquaponic systems do not have filters (well Deep Water Culture does but...), however I believe adding this type of filter would be a huge benefit to aquaponic systems.

When I met Alex Blackwell, I brought with me a bag of Hel-X media. The idea was to build a moving bed filter for his system. After a day or two of collaboration and brainstorming, we got the idea of using a moving bed filter as a prefilter for his pump. 

Alexs pump is in the fish tank and the mechanical filter it came with got clogged weekly with all the fish waste. This slowed the flow rate and turned the water a murky brown color, not the best. We designed and added the moving bed filter to the pump. The pump pulls the water through the moving bed filter and stirs up the Hel-X. It works amazingly!

The filter has cleaned the water and increased the flow rate.
Once the bacteria is fully established, it will provide filtration
and nitrates for the plants.

The moving bed filter in the Blackwell system cleaned up the water and increased flow rate. Once the bacteria has a chance to colonize the Hel-X the filtration will consume the ammonia and decrease ammonia spikes. Plus once it is established, it will be pumping extra nitrates into the grow bed each time the pump runs, which is 15 minutes of each hour.

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Plant Growth

Howdy Everyone :)

I got a quick update on my system. The Deep Water Culture (DWC) grow bed is doing great!. The arugula has gotten much bigger and is producing new leaves each day! My heirloom tomato plant is a CHAMP! It has been growing since day one in the expanded clay grow bed. That is much more than I can say about the herbs I bought and tried to transplant. Only a few rosemary branches survived. The dill and parsley did not like it, but I blame this on the plant. When I bought and washed it, the roots did not look too good but I decided to plant anyways.

Here are some pics, Enjoy!

Both grow beds doing well!

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