my friends betta has been acting strange, it could be weather but there other ones are not. The fish has been lethargic, not eating, was thinking with the storms out here maybe weather caused the behaviour. I have very little knowledge of betta behaviour could it just be sleeping or stressing due to conditions. They don't test water but do treat it with chlorine treatment, and change water regularly, and the tanks are small so its 30 -50 percent weekly water change.