09-29-2011, 12:43 PM
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How long could a koi and goldfish stay in a 20G long tank?
Back in like April I think when my other large koi went back into the pond from overwintering, I got a small koi and golfish and started quarantining them in the tank. It's been about 5 months now then and I guess they're fine but I don't want to put them out in the pond now with it getting colder since I never got to make a larger deep pond like I wanted, so they'll have to stay in there for a while longer. I don't have a filter or anything on it, just a glass cover and it's on a window ledge so it gets some sun, and I have anacharis in there and will put some hyacinths in there and hope they aren't eaten to shreds like the last bunch I put in was, and I do water changes every few days. Nitrate is low, last I checked, 10ppm I think it was, whatever the lowest marker was other than 0, but I don't have an ammonia test right now and was worried it might build up with no filter. LIke I said, theyre small, only about 3inches long each, just thinking since I couldn't get them a pond to stay in I'll make their tank nicer with some actual substrate(just have a spattering of ammonia absorbing gravel things and a pile of rocks in the corner) and maybe rig up a light for them.