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  1. A very good post of what is IAVS was submitted recently by Dr. McMurtry. I felt it deserved it's own thread. VKN - and anyone else who may benefit/care: I’m going to attempt to smooth your ruffled feathers. I DO want very much for you - and everyone else - to succeed ‘beyond your wildest dreams’ (exceed expectations). If I didn’t, then I wouldn’t still be typing, or otherwise infecting APN with my demonic ‘attitude’ - or ‘putting up with’ hostile lying trolls. I hesitate to craft the definitive ‘definition’ of iAVs at this time, but I’ll ‘give a shot’ at listing what I consider to be the basic requirements: Water: fresh (non-saline), clear (non-turbid), non-polluted (no biological pathogens or ‘chemicals’, metals or nucleotides). Basically, potable water. Rain water is strongly advised for the vast majority of applications/locations. Its also free. (collect and store securely in advance of need). Sand: well-draining, no clay/slit, and chemically inert (does not raise or lower pH of water that comes into contact with it). We’ve been all over this topic in detail repeatedly. “Sand†is a specific range of particle size, not a specific material/mineral composition. Quartz (SiO2) is recommended if/where at all possible, but some other inert minerals and glasses may work well also. Others certainly will not. Operating beyond the scope of our recommendations is at the sole responsibility/risk of the operator(s). Furrows: on the sand surface to distribute ‘water/waste’ evenly across surface and also to keep aerial plant material dry. Pristine sand furrows are stabilized by bacterial films, detritus and/or alga. Attempt to maintain as much ridge area (mound between furrows) as wide as possible. Furrows include both between all rows of plants and around the entire perimeter. Flood/Drain: Saturate filter substrate and then allow it to drain completely once every 2 hours (approx.) during daylight. Leave drained overnight. In the tropics, first ‘cycle’ can begin somewhat pre-dawn and the last start at dusk (finish draining just after total darkness). Since drainage also occurs during the pumping interval, presuming sufficient drainage, one can pump 1/4 up to even one-half of a FT volume per cycle without reducing the FT volume by more than 10 to 15% at any given time. ‘Tank’ (fish containment), Its capacity, proportions, shape (especially bottom slope) and the pump type/location need combine (‘work together’) to effectively allow solids to settle, and collect in a region/zone that the pump will readily extract/remove when it comes on. Try to schedule irrigation volumes sufficient to exchange (turnover) the FT at least twice each day. More might be ‘better’ - which can be accomplished several ways (not described here to avoid confusion) but not recommended to do so by shortening the on cycle interval significantly. Fish/Feed: Sufficient fish biomass and feed input consumed to satisfy fish and generate sufficient ‘waste’ to fertilize the number and species of plants being grown - not feed/stocked more than the filter/microbes can process continuously. This will vary by fish species, age (size), density, DO, pH, Temp, of water, and feed composition/conversion. Do not feed in the evening (allow for complete tank volume exchange between the last feeding of each day and dark). Sustainable fish load and feed rate also varies somewhat depending on type of plant species grown (e.g. leaf vs fruiting) and somewhat on the stage of development/maturity. Too many fish eating too much feed and respiring too much TAN for the size of the biofilter bed in current use is not advised. One could get away with this in the short-term but not over the medium- or long-term. pH; iAVs is dominantly (90-95%) Horticulture - by mass and economic value in most markets). Maximal fish production is NOT a goal nor advised. Vascular plants strongly ‘prefer’ (grow best) in range of pH 5.5 to 6.8 (extremes) and optimally 6.4 +/- 0.4 (variance range depends n specific species). Believe it or not. If one is satisfied with the results of one’s efforts, then that’s wonderful, really!. If one wants to improve one’s circumstance further, then consider accepting best-intentioned advise. Soil microbial ecology. Microbes evolved along with the plants they sustain/interact with, meaning they too benefit from pH in the ‘optimal’ range. In a ‘controlled environment e.g. greenhouse Pests and diseases: Take every prevention precaution possible (too many to describe here). A common vector is humans: limit and pre-sanitize all visitors and workers. Monitor for any/all developing problems continuously and have appropriate remedy available immediately. A gram of prevention yields many kilos of cure. Use integrated pest management strategies extensively (employ beneficial insects, bacteria, and plants). Use insecticidal soaps (Potassium salts of fatty acids) and plant-based extracts with care (minimize/eliminate contact with filter substrate) Maintain air temperatures and humidity levels appropriate to the plant species being grown. Shade, fogging, evaporative cooling can each be effective for cooling, either individually or in various combinations. Always provide ample ventilation and continuous air movement within a greenhouse. Above May Not be stated the best way possible: Its just what keystrokes I activated this morning. Any remaining gaps, errors or omissions are not intentional and regrettable.(and correctable). Questions to ask yourself - OR better yet, to share your responses to here: Is your water ‘clean’ or is it contaminated? (e.g. nitrates, phosphates, pathogens, …) DO you have/use an inert, well-drained sand (sharp SiO2 preferred) DO you flood saturate and then leave drained on 2+/- cycle during the day? Are you maintaining ‘system’ (water) pH in the range preferred by plants for optimal growth? Above pH 7.0 is NOT recommended. Do you have a ‘balanced’ fish load and sustainable feed input rate? Are you growing nutrient demanding crops (solely lettuce is not advised)? If you answered Yes to ALL of the above questions, then congratulations … you’re amazing and quite unique. I say that in spite of the fact that I will always insist that AP is a disease. Some diseases are curable, others are not. You’re Welcome. ============ PS: Yes, I am fully aware that focusing on plant production (minimizing fish to plant ‘ratios’) is viewed as blasphemy by many, if not most, aqua-holics. This is not a concern I have. No one is attempting to prevent anyone from doing precisely whatever they feel like, be that rational or otherwise. Don’t freak out or invent fallacies. I am describing what iAVs was intended to do, aka how it ‘works best’ (to date). What anyone who is NOT literally doing/using iAVs “feels†about claims and goals thereof is irrelevant to me. Do it or don’t. Your choice. Your life. ....... BTW: Not seeing is not believing ... and vice-versa If you do undertake iAVs, then please accept our advice in the spirit intended. My/our intention is for you to realize the best outcome possible, with the greatest cost:benefit possible. There is and never has been anything (positive) ’in this’ for me. iAVs has always been exclusively about you (others). That is all. No fee, No exchange, No refund. No apology.
  2. A question was raised as to how pH effects fish growth. While the answer is likely species dependent, here is one study that shows growth to be similar at pH's many have argued are too low to grow fish at. I always feel it is good to question preconceived notions whether others, or our own. http://www.sciencedirect.com/science/article/pii/0044848677901569 Anyone else has links to other studies, feel free to post them here.
  3. I have been into aquaponics in my backyard for over two years now and I am still learning. Now I am planning on getting an aquaculture venture going using above ground pools. I have already found that it is a different game and I accept the challenge. You can see my setup on YouTube by searching for HOWponics. Glad I found my way to the Aquaponics Nation.
  4. Have this system in mind. A picture is worth a 1000 words. Will this work?
  5. Welcome to my journal / history of my Aquaponic project. I hope to tell all of my adventures to date. Feel free to read as I go or wait a couple weeks until I have completed it. I have multiple pictures and videos of my project. Let's get started. I live in a cave. It was originally a sand mine in Festus, Missouri ( USA ). My wife and I along with our three kids started our adventure some seven years ago. On tight budgets and frequent lessons we have built our home. You can review our home at : http://www.Caveland.us Our home has three chambers. In an effort to identify best use, I have been experimenting with Vanilla plants in the middle chamber. What caught my interest was the conditions. Apparently the Rain Forest Floor has a lot in common with my cave. High Humidity, steady tempatures and LOW lighting. I was amazed how well Vanilla did in my home. Aquaponics caught my interest and I began reviewing my options. I had an old pond liner scrap and I had a fresh water source under the cave that I could get to through a Cistern that is about 14 feet deep and wide. At the edge of my floor where the concrete meets the sand that meets the rock wall, I dug out the sand and found that I had a
  6. I have been doing aquaponics, and hydroponic in a greenhouse as well as earthbound gardening for several years. I'm planning a new vermiculture /aquaponics system, and just put up a blog to keep my friends up to date. I hope you will visit. http://chicoaquaponic.blogspot.com/
  7. Fiberglass Reinforced Polymer (FRP) Construction Capacity: 2000 liters, 2 tons Load Dimensions: 2000 mm x 1000 mm x 1000 mm GREEN: BLUE: These tanks were originally designed as Aquaculture Transport tanks that can be mounted at the back of flatbed trucks. Still in design stage... Factors like min or max Capacity, Color etc. are still subject to market demand.
  8. This is kind of directed at kellenw since he is only a few hours away from me. I am looking to expand what i have built up over the past year. i currently have indoors: 1 200 gallon grow out tank 2 75 gallon tanks 2 55 gallon breeder tanks a 30 gallon and a 10 gallon for fry. outdoors i have approx 700 gallons...but during winter i have to move inside to the limited tanks. I have way to many fry/fingerlings at this point. im looking to try and go into business for selling them locally (i dont want to butt into business for anyone on here) how should i go about starting a business, and how/who should i contact to try and get an outlet for my production? im not really looking to make much money, but at the same time i dont want to sell my self short...i just dont want any fish to go to waste when they could be put to good use.
  9. Charles Mulamata is may name. i am based in Uganda, East Africa. I am adopting aquaponics for fish and vegetable farming. i have set up a demonstration system with 500 tilapia fish and Several grow beds. I am also setting up a cat fish tatchery in a weeks time. We are to start training in aquaponics by holding workshops and seminars on the subject of soil less agriculture. I am an electrical and electronics engineer. i have a metal fabrication facility with machinery to make doors and windows for the housing industry. We also deal in renewable energy and power back up systems. The aquaponics system is being developed by our Entrepreneurship Institute of Technology. This institute also makes bamboo bicycle frames under the partnership of Bamboosero a California based company owned by Craig Calfee (the inventor of carbon fiber bicycle) www.calfeedesign.com. We also import second hand bicycles and sawing machines from New Jersey USA www.p4p.org I have had a passion for agriculture and fish farming. Traditional fish farming methods have several problems including predators like birds, snakes, animals. and humans. This is mainly because fish ponds are always situated in remote places which are difficultt to supervise closely. With aquaponics, you can do agriculture in your compound or back yard. Aquaponics is a system that can solve food security, poverty, malnutrition, and women emancipation for especially developing countries like Uganda. So it is my desire to spread the knowledge and help my local people as much as possible. I really look forward to the members on this forum and to share with then. Mulamata Charles
  10. Hi, I'm new to this new steps of Aquaponics and I would like to know if there is any place here in New York City where I can go and have some training. Can you help me? Thanks!
  11. The New York Times has an article about tilapia. http://www.nytimes.com/2011/05/02/science/earth/02tilapia.html The article is not entirely "supportive", citing lower omega-3 fatty acid content, along with the environmental concerns about aquaculture. Unfortunately, the article does not mention aquaponics at all. Still it's interesting to see how the mainstream media are gradually becoming aware. --jrd PS: Off topic, but interesting... the only reason I noticed this article was because of Osama bin Laden. One of the cable news channels ran a piece about how the late announcement on Sunday night forced east-coast newspapers to "stop the presses" and redo their front pages. As an example, they showed the before and after versions of the NYT, and the "before" version had this article about tilapia.
  12. Hi I had a back injury in 2005 and I can no longer work full time, also I had a daughter born in 2007 with a bowel disease that has affected 75% of of her large and small bowel hence she is very sick so and has to undergo a major operation in a week to remove all of her diseased bowel which will leave her 35cm of small intestine, very scary aside all that I would like to start a profitable Yabbie farming business in my back yard if possible to supply local restaurants with live and pickled Yabbie is there a system of aquaculture that can accommodate this? I already have a pond/pool with approx 150 yabbies which are breeding at present I have been feeding them Lupins and the occasional feed of veggie scraps. I really want to know if I need to separate the pregnant females or remove the large males. If there is a system that is affordable and proven I would like to know about it cheers, loc
  13. As I was diggin out the old rubble in the garden seat, I realised that I could make a pond here, in the magic garden. Now i am clear and have stacked up the re-usable rubble an lime-capstone Im wondering about the slope of the base.... How 'steep' should the base be to the collection point where a pump could be used to suck-up the rich nutients that Marron or/Fish may pooh happily in my envisioned pond? thanks.