When I turned my tank lights on this morning i come to find my endli floating at the top of the water, slime coat falling off, eyes looking a little cloudy, snails on him. Idk whats going on, everyone else is fine in the tank including my 4 other polys. Water parameters are fine, plenty of oxygen. Do i need to move him to a qt tank or will that stress him out more? I do 50% WC every tuesday, so im not sure what the issue is.