Got up this morning to see my bolivian ram hiding in his little barrel rock on his side. I initially thought he was dead. After moving the barrel he began to swim around but he keeps going belly up and twisting around when he tries to then goes back to laying on his side and breathing heavily. Not sure what is wrong or what to do. I don't have an extra tank right now to put him in. The one I had got cracked. I just did a water change Wednesday. I have other fish in the tank and they seem fine. Very active and eating and swimming fine. Do I need to be concerned for them as well?