Just bought two clownfish two days ago already lost the one and now my other is laying in the sand on his side and appears to be breathing heavily. I know my water is fine I’ve tested twice in the last day but it is a new tank but I did add bacteria to the tank to ensure that I could add fish not quite sure what the problem is I put a air stone in the water I thought it might have been the problem but it’s been about 16 hours since then and he’s still breathing heavily I don’t know what to do I don’t want to lose my other clown