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  • Birthday 12/28/71

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  1. Not only does it use a check valve to keep the air flowing in one direction, it also uses a high volume air pump. Usually a Hakko, it puts out about 40 LPM or greater while using less power then a water pump. Another design feature that Glenn sells it as is that it can be secured in a class room and the hose run out to the outside to the tank.
  2. There are several videos that show it how it works. Usually it doesnt use a water pump at all. To see the actual design of check out this one: (older video and design) To see another video of it from a 55 gallon barrell straight up 15 feet feet: I'm only posted these because when I see stuff about airlift, it uses the traditional 2 feet submerged to lift 1 foot up. Sorry if I'm not conveying myself concisely, its not my airlift design.
  3. try this one
  4. Did you watch the video? 15 feet without 30 feet of submergence. (Only about 3 feet I think)
  5. I use food grade iso resin I get from the fiberglass shop in town
  6. CTHAR over here put together a presentation regarding the profibility and sustainability of aquaponics (preliminary) based on 3 farms financial data. I dont agree with some of the numbers and claims but its interesting. http://www.ctahr.hawaii.edu/sustainag/workshop/downloads/Aquaponics-May2013/Tokunaga.pdf
  7. Yes, I tried to get rid of it awhile back but its too hard to move. We moved it from one side to another and I had to reseal it.
  8. Recent pics: Far end looking up: You can see ong choy nearest, then some tomato plants growing wild, chayote squash vines, lilikoi vines, loofah vines. Theres also taro, kale, nasturtium, and some weird red plant that came in an east-west salad mix. 2nd Section (bottom part houses malaysian prawns) In the small tray is a kind of aquatic plant that is similar to azolla called silvinia molesta which has about 30% protein but each plant is much bigger then duckweed or azolla. In the growbed is green onions, kale, a kava plant experiment, and a few other random plants. Looking back to far end: Nasturtium edible flowers, papaya plants that need to be transplanted out desperately, some water chestnut plants, those weird red plants, fennel, kohlrabi, beets, a rose plant, a straggling tomator plant, and the other stuff i've mentioned in the 1st pic.
  9. Some of the AP farms here do use chelated iron, bone meal, and/or kelp meal and are still certified organic. Just because Tim couldnt find a buyer for his fish doesnt mean its not profitable. They're on another island, but our aquaponic farmers here on Oahu sell their 1-1.5lb fish for $4-6/lb and 2lb> for $8lb live, in chinatown. One farmer claims to sell 300+lbs per month. The dept of ag here cited that 800,000 lbs of frozen tilapia is imported into Hawaii at the cost of about $0.90lb. per year. Most of the locals do not like tilapia, but that is slowly changing. Alot of the immigrants love it however. To recap, frozen tilpia sells for between $1.98/lb (whole) at a popular local fish market. $6.99 for fillets at Costco imported from Honduras. Live farmed fish sell for $10/lb and up.
  10. Heres another video that shows the plumbing in better detail. 40 watt pump moves about 150 gph.
  11. A few years ago Glenn Martinez came up with an airlift pump that can push water up to over 20 feet. It does use a pretty powerful Hakko air pump (and expensive) but the energy consumption is less then a water pump. Heres a video: Basically the air pump moves the water. The one way check valve allows water in but does not allow the air out so water is pushed up in one direction. The airlift does make a curious gargling noise, hence the silencer. I believe he has a new build now that uses another pipe within another pipe but I havent seen it yet.
  12. With the help of my local forum members, we broke down and moved 2 of my systems and started building a new, 28' foot long, 850 gallon system comprised of unsecured cinder blocks stacked 2 high. (If you dont go more then 2 blocks high, it wont push the blocks out). I used common EPDM liner for the fish tank. I decided to separate the tanks to keep my malaysian prawn experiment separated but in-line with the system. Above the tank I built the growbeds. A single laguna pond pumps pumps up to the spray bars and drains at the end of each growbed. Cost of materials: 150 cinder blocks: $343 + $79 delivery ($60x2 for pallet deposit) enough wood for a 4x40' growbed: $323 discounted epdm liner (10x30) $285 LDPE liner - $300
  13. Can you use this? http://www.ctsa.org/files/publications/Aqua_Curriculum.pdf
  14. Ah, I see. Yes threads usually derail after about 5 posts. I'd love to talk about commercial viability of AP but am not interested in bashing businesses... I've never met the Friendlies but have heard things about them. I prefer not to speak ill of people myself. I do not think that UVI invented aquaponics, perhaps the modern version of it. I think its widely acknowledged that the ancient Chinese, Hawaiians, and Egyptians practiced some form of aquaponics but now we have electric pumps. I do not agree that everyone tries to get into commercial aquaponics, many are happy with a backyard system and some do not get it at all. The concept is simple but "hard to master" since it involves at least 2 different fields. In any given field, youre going to have your scammy quick-buck artists. A few of us webmasters have gotten together to share notes on one individual who used to rip off images and posts from various forums and try to sell a crappy get-rich plan. Any amount of research or investigation will show who is the real deal and who are rip-off artists.
  15. I'm a little confused about this thread title and the actual question originally asked. I responded to the subject title "Commercial Aquaponics - The Current State and a Little History" but the actual question is regarding FAP and their reputation so if my posts do not make sense, it is because I thought I was responding to the subject title. Jeremiah, I do not agree with your summation, it seems like its written biased.