I am a first time fishr owner. I've had my first for over 1.5 years but this last month he's not been feeling well. His fins are looking ragged and he's just hangs at the bottom of the tank. His appetite is fine, but otherwise not normal. I bought stress coat and change it every day for the last three weeks (sometimes I accidently let it go a couple days) but this isn't helping, maybe a tiny bit of improvement. What do I need to do, buy, or anything to help him.
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