hi my weather loach has started to float upside down and is stuggiling to breath atm he is floating upside down at the top of the tank he keeps breathing in air from the surface and then releasing it from his air whole thing dk what its called sorry ive tried giving him a pea but he doesn't want to eat when I found him he was on his back on the bottom of the tank until now he is floating since I helped him get air and idk if this helps u figure this out but my sister said this morning she heard a plop like bang from the tank and looked over and he was floating and also one of his eyes is slightly swollen so idk if he hit the glass or when too far out of the water any help is greatly appreciated thanks chloe