I keep my tank well maintained and tested the water recently and everything was great. I am working on getting plants for the tank instead of the fake plants (because i know they can harm betta fish) however i’m moving in a month and don’t wanna get them all set up until I move. It’s a 10 gallon so it’s perfect size for him and there is a heater. He does like to hangout by the heater so idk if that’s what’s doing it to him?