Ok, so I moved Ghost out of the community tank into his own 1 gallon tank. He seems to like it ok but keeps swimming around like he is expecting more room and I can't keep the temps steady. Last night it was 75*, today it was 62* and now it is 68* . I'm thinking about putting him back in the main tank and waiting until I can either find a heater or another way to keep his small home warm. Any advice? I never had any problems when he was with the other fish, hes very docile and everyone else left him alone.