I did my home work well, and had a nice cycled, heated and Betta appropriate decorated home for my BettaBlue prior to bringing him home. I am having trouble keeping the water below 82 in my office due to the inability to control the heat (I'm in a medical setting). He is happiest at 78F. I've removed the heater from his tank and it still stays at 80-84, and he does NOT like it! I am thinking of getting him a 10 gallon tank, but not sure if that would make a difference considering the ambient temperature is the issue. I'm afraid if I leave a fan on it will get too cool at night. Any thoughts or suggestions? Maybe I should move him closer to the window for the winter months?