So i'm failry new to fish. this is my first summer with fish tanks ans my 10 gallon betta tank went from 80 to 85. My 36 gallon that only has harlequin rasboras and 2 nerite snails (eventually it'll be a community) went from 77 to 80. sometimes it goes to 81. i'm worried about my fish not liking the heat. I don't know how to keep it from going up. i'm guessing its not drastic because its caused by the outside weather but it still concerns me. i put my air conditioner into the living room where both my tanks are to try and help cool it off but its not doing much. is there anything i can do to cool them down? I was thinking about buying a bubbler to create more oxygen for them. Is this necessary or will they be okay?