I found two of my fry dead yesterday and immediately did a water change in my 2 gallon fry aquarium. I took the water in to be tested today and the nitrites and ammonia level were extremely high, so I bought what the girl recommended, AmQuel plus, which is supposed to remove nitrate, nitrite, ammonia, chlorine, and chloramines. I put it in today and waited a few hours. Then I tested the water and the nitrites were still at the top of the test strip, but the ammonia has gone down and everything else is in the safe range. So now what? Do I wait until tomorrow and do another test to see if the levels have gone down anymore and then re-treat the water or should I retreat it now? Do I do another water change? Someone said to put some gravel from my established aquarium into the fry aquarium. Will that work? Any advice will help! THANKS!