As most of you know, I've had green water issues for about three weeks. I got tons of advice and opted to keep the lights off most of the time, and do frequent water changes. Up until the past few days my fish have been doing fine. The green water is finally going away but now at least one out of four otos is missing and another one is ill. From what I've read of his symptoms--lying on his back, gasping a little and red around the gills/dark coloring--it sounds like he might have nitrate poisoning. I don't have a nitrate testing kit at the moment but since my plants are growing like mad and the water has been so green, I'm assuming this is what's wrong. Now that the algae is disappearing and I'm doing daily water changes, the nitrate should be going down, yes? Is it possible for my oto to get better or is he doomed?
BTW, ammonia and nitrites are all at 0.
BTW, ammonia and nitrites are all at 0.