Dam I hate this, my 29g has two Red bellies, after turning heater off two days ago and the light off for 1 day, it is still reaching 84 degrees, keep in mind that I am not treating them for diseases, Normally their tank has been at 78 degrees stable, but last two days are bad. Is there anything I can do to lower temp besides cold Water Changes and Fan on tank....only HOB Power filter and two penguin 660r's UGF are running now. HELP Pls, all my attempts have been failures right now.