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Found 8 results

  1. 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.
  2. Hi all I would like to seek for your advise on this topic. About a year ago I set up an aquaponic farm; I have two independent systems (let's call them system #1 and system #2) under the same greenhouse; each system has 2 IBCs as fishtanks, 15 square meters for growbeds, and 5 square meters for floating raft. Each has two IBCs as sump tanks. I started with Tilapias - big mistake because of temp- during winter I spent thousands trying to keep water at a decent temp. On jan, I gave them all away, cost was crazy. Then I got trouts (240 fingerlings, 60 for each IBC). They were doing great at first, but one day, around 100 of them died suddenly, all from system #1: My immediate thought? oxygen -- so besides the 4 air pumps I already had for both systems, I got 4 additional 60LPM pumps and 8" airstones, and put one for each fishtank. On march, 10 more died out of the sudden, no reason -- system #1 again. On april, 2 or 3 more died, so I got tired and started checking up system #1, I took all the fish out from that system and put them in a separate, 300 liter tank with fresh water; I do water changes every 5 days -- water is sometimes soo dirty I cannot see the trouts -- but nothing happens to them -- happy and eating. Yesterday, I decided to take around 100 liters of water from system #1, and mix them with other 200 liters of fresh water, so the remaining fish could start to acclimate to their original system --- today, 2 of them dead. pH: 6.5 on system #2, 6 on system #1 Nitrites: very low on both systems Nitrates: around 20 - 50 on both systems Ammonia: 0.6 on both systems Water temp: oscilating between 15 - 17 C daily. EC: 0.351 on system #1, 0.353 on system #2 ppm: around 200 each system. I did a complete change of water for system #1at the end of march. Plants in system #2 are beautiful, but in system #1 are very small, they look sad. I just don´t understand why the fish suddenly die, during night. I´ve cracked my head for months now, and I cannot seem to find the answer; also plants are not growing as they should. Is it possible that some plants affect the water or the fish in some way? I ask you this because in one of the grow beds I have some very nice little plants, like water lilies, except they grow on soil; Also I keep a very small plant of levomenthol - I keep them because my mother likes them and uses them - but I am starting to think maybe some plants are affecting the chemistry in some way. Is there anything you can think of? Thanks in advance.
  3. 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.
  4. So where I live the Alkalinity in the water is very high. For the longest time I was pouring tons of PH down into the water spending tons of money unnecessarily. I finally ponyed up some money for a Reverse Osmosis filter. The only real downside (and if this is a real concern is up for debate) is you suck all the minerals out of the water but since you are adding your own this is not a problem. I have totally taken care of the alkalinity problem and I no longer have to muck around too much with PH. Enjoy!
  5. Hey guys, So this might be a stupid question but I want to use metal braces in my beds to hold my plants up. The metal is exposed, there is no coating. Will this in anyway change the water quality/content? Thanks
  6. I'm having problems keeping a high enough PH in my approx. 300 gallon IBC. I have been doing partial water changes which seem to work short term but I've had to supplement with a liquid PH upper. I need something a bit stronger in order to maintain a constant PH. Any suggestions?
  7. Freshwater test kit

    From the album Mr Bill's AP Book and System

    Very useful to have to test water parameters. Highly recommend this test kit.

    © William Anderson

  8. Having a problem with my PH, I am adding builders lime 4 or 5 times a day to keep it around 6.8. Read on a few of the topics that GH and KH have a lot to do with the stability of PH. So I went and purchased a GH and KH test kit, the GH was around 300 and the KH was 0. upon further testing I found out that the water source that I was using from my house was soft water. I got some water from a different line in my house that was hard water and the GH and KH all test in the ideal range. So the question is how can I change the GH and KH in my tanks without changing all of the water. Please let me know what I have to buy to add to the water. The fish are growing like crazy and the plants are doing great. The Ammonia, Nitrites and nitrates are all low on the test. Thanks for any info. Tom