Hey all. In August we got 4 new platies. Sadly one was sick and died after a month so we got a new one. One of the original ones is looking pretty bad as well. He spends half his time swimming normally (although hiding) and the other half on the gravel by our filter, in the boat or swimming low. I'm at a loss as what to do. As I'm writing this he is by the filter. This has been going on for 4 days or so. Info: We've had him since August 19th, all other fish are fine in the tank, I can't test water parameters but nothing has changed and I don't see why there is a problem, all fish are peaceful as far as I know, no external parasite (the last one was ich which went a month ago). Any other questions I'll be happy to answer. One idea I had was a tiny tear I saw in his tail. It might be natural but maybe he's hiding and doing that because he was nipped by our other male platy or the danios? Not sure. Thanks!