All Activity

This stream auto-updates   

  1. Today
  2. I have access to free 55gal barrels that once contained sodium hydroxide. From what I understand, The barrels can be cleaned and neutralized with acetic acid. Would these barrels be safe after cleaning, neutralizing,soaking and rinsing several times and doing a ph test on water soaking in the barrel ?
  3. Excellent find. This becomes more & more relevant.
  4. Yesterday
  5. Hello everyone, hope all has been well. I'd like to get the thoughts on what the ideal range for the various nutrients in an AP system. I'm sure that these levels have been discussed in various and sundry different threads, but I can't seem to find one that summarizes all the nutrient/water parameter findings and recommendations.
  6. Last week
  7. photos from first week of march, 75gs
  8. Thank you Ande. My mother-in-law was sweetheart and fun to be with. And she liked me! Not a lot of son-in-laws can say that! She fought kidney failure for the last two years and a heart attack and subsequent congestive heart failure was the final coup de grace. For those of you that have high blood pressure, you need to do what it takes to bring it down. It will destroy your kidneys and other organs, and dialysis three times a week is no picnic even for the toughest people.
  9. Hi SEAmyco Welcome to APN/HQ Nice sytem/pics thanks for posting In pic 5 you have an aerator, I would relocate it, to above the waterline , so to avoid water from siphoning back in to it, and/or get backflow vents on it. cheers
  10. Hi Cecil My condolances to you both cheers
  11. I believe the copper fittings (the ones in the second picture?) are just for the water coming into the fish tank. If the water is the right temperature when it hits the temp. gauge then it goes into the fish tanks but if its too cold it gets sent back through the wood-boiler system and reheated and then sent to the fish tanks. I didn't think about that and thats an interesting point. If there is any copper (or any other metal) in the water then the mushrooms will suck that right up and there will be metal content in the mushrooms, which isn't great. I am currently trying to get all the right kinds of meters and gauges to start getting measurements on the environment. I'm not sure how I could test the water content for metal but that is definitely now at the front of my mind. I still need a better temp gauge because the thermometer I have isn't getting a good reading in the greenhouse just because of the differences between areas in the sun, shade, and certain distances to and from the water. The water is at a constant 78 degrees but other temperatures and so varied.
  12. Probably won't be selling some of the fish to the prospective buyer for his pond. His new pond is having turbidity issues and I have referred him to a source for larger rainbows. From my experience the smaller trout do not tolerate turbidity well especially if it is continuous. No big deal as I will hold on to more trout and/l or plant more in a local stream with a blessing from the department of natural resources (permit required.)
  13. The cool thing is now that they are free swimming in the tank, I am not seeing the waste on the bottom of the tank I did when they were in the cage. The movement of the fish and the side drain - plus purging the bottom drain at least twice a day -- is removing solids, and moving the rest to the filters. When I drain the fish tank down to a few inches, and replace with fresh water, there isn't much waste left around the drain. What little there is, is pushed into the drain with a small aquarium net to be sucked out. They are also now actively swimming against the centripetal flow created by the discharge from the sand and gravel filter and the discharge from the chiller. This not only reduces their effort to get oxygen (ram ventilation), but it keeps them occupied and less likely to fin nip etc. And they are evenly distributed in the water column. I will include a couple more photos when I get the chance and access to the wife's iPhone camera. She is out of town right now due to the passing of my mother-in-law.
  14. Thought you might like this panoramic photo of 'circle of life' project @ Honeyland Aquaponics Sholinganallur, Chennai. This is what we could complete in about 10 days and where we are as of today. Click/zoom to enlarge and move around.
  15. Aufin, Neem oil seems to be a good choice in managing nematodes. Let us know how your trials went. I have been using it as a diluted foliar spray for various pests as a general purpose insecticide, miticide, fungicide, etc. Even if it drips a bit in the sand beds, there are no adverse effects seen for most all fish. Some fish like climbing perch were found sensitive to it and we saw some mortality. There could be other reasons for that episode though. I forgot to say you can also use Marigolds (Tagetes spp) as a companion plant. They are known to repel/suppress/reduce soil nematodes naturally. Planting them densely before two months of introducing host plants such as tomatoes is another option.
  16. Trout are between 3 and 4 inches. Feeding well every three hours. Act like they can't get enough to eat at feeding time. No illness but some seem to have slightly short gill covers. Could be genetic, a vitamin deficiency, or damage from moving them. One expert said the gills covers on the ends are very transparent at this stage so they may just look that way. They are now free swimming in the tank vs. a floating cage in the tank. Some will go into the outside pond in a couple of weeks, some will be sold, and the rest will be planting in a nearby stream with permission from my department of natural resources. I had to put a screen on top of the tank. I've had a few jump out!
  17. Earlier
  18. cecil, how are your trouts thisdays? Growing i presume? What size (grams), are they now? Did u had some troubles with some illness to the fish?
  19. Yes I'm sure it's the RKNS. Stripped all plants out, decoupled the drain from the fish tank, capped the drain line and flooded with water. At present bed is sitting filled above the sand and treated with neem oil. Will drain and flush with fresh water tomorrow. Hopefully when reattached to the tank any residue should be light enough to not bother the tilapia and maybe provide a small treatment dose to the rest of my sandbeds. I know the other beds have RKNS but not to the extent of the large bed. Intend to establish a light maintenance dose of neem to try to get rid of the remaining nematodes. The scientific papers I've found trialling neem for RKN treatment have been very positive. But they were trialing traditional dirt farming, not closed system APs. Hope this works. Noone I've talked to has offered any guidelines for treating an aquaponics system, so I'm pretty much in trial-and-error mode......hopefully with minimal error.
  20. Are you sure they are nematodes? I have not observed any nematode infestations in our sand culture yet. However, I am asking the operators to closely examine the plants especially those growing in older beds to look out for yellowing of leaves, smaller leaves, less yields, stunted growth, etc. They may have come through infested sand (river/beach sand), nursery saplings (used directly without removing potting mix), or soil attached to tools used elsewhere, etc. Sanitation is important. One of the many reasons, I use gravel in the pathways as mulch to the soil surface around the beds and not allow any visitors to step on the bed walls (seen people doing it), etc. Management of it organically is quite difficult in soil culture as nematodes spread everywhere easily. Soil farmers try to reduce infestations by fallowing, crop rotation (not very effective), soil solarization, etc. You may want to try solarization in your sand beds. One way to do it is to moisten the bed and cover it with a translucent plastic tarp for about 6 weeks during hot summer. This would kill all your nematodes. I am sure there are better/quicker ways to tackle your situation. What do others think? 'Circle of Life' project is shaping up well and we are equally excited in seeing its go live in about 2 weeks from now. Good news is it is going to be all sand culture/iAVs. No other growing techniques are deployed here. I will update the status.
  21. VK, have you found any Root Knot Nematodes in any of your iAVs systems? Found my beds have been invaded by RKN's and researching remedies suitable for AP/iAVs. Anxious to see your Circle of Life finished and producing.
  22. We are currently busy working on these projects L and N, Honeyland Aquaponics ("circle of life" school project) in 700 m2 and Coimbatore Aquaponics (a village scale owner/operated project) in 160 m2. Here are some update pictures from those sites.
  23. Here is another group of family farmers that took up aquaponics recently. I guess it is |project M', will confirm later. It is a self-providing domestic unit in about 101 m2. Two species of fish will co-exist here, red-bellied pacu and monosex nile tilapia. Anything else you want to know, please just ask and I will try elaborating.
  24. Looks a very well put together system? Is it decoupled? The reason I ask is it looks like you have copper fittings on the plant side and copper/other metallic fittings can be a toxicity issue if in the fish loop. As to integrating myco culture in- I'm still experimenting without success to date. I have mycelial filters though have not had any fruiting from king stropharia. VKN is trialing some in his sand beds.
  25. I'm new to the system, but it is a wood-boiler heated AP system with 8 raft beds and 2 wicking beds. I'm unsure as to how to start integrating a mycofilter into it. The wicking bed will have a cococoir/perlite mixture and have plants all through it. It isnt set up yet so that seems like the easiest place to start without messing with the system too much.
  26. Latest update.....
  27. Cad design of the Garden iAVs....
  28. New Garden iavs for ORGANIC veggies....circular fish tank with sand bed around the perimetre..(7/8 area) Simple design and easy to construct... Also minimises equipment, time and cost....
  1. Load more activity