02-27-2011, 03:25 PM
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I have an Australian Rainbow fish in a 25 gallon aquarium. The water parameters are PH-7.2, Ammonia- 0-0.25, Nitrite- 0 and Nitrate- 40. I know the Ammonia and Nitrates are a high and I'm working on that right now, I have them a lot better than before and am doing another partial water change soon. But I just realized that one of my Australian rainbows was extremely thin and he was gasping a little faster than he was supposed to be. His excrement is white and string- like. MY other two rainbows are fine and so are my guppies and pleco and everyone else. I just don't know what's wrong and I really don't want to lose him. I feel like crud because I hadn't noticed it for so long, he's not eating much and I'm worried. This is a non-planted tank just so everyone knows. Can anyone help me?