My tanks have been a little on the warm side for the past few days and I can't figure out what to do about it. The house is always at about 75 degrees ('cause of the air conditioning) which is a little cold for the tanks, but even with the heaters at the lowest settings possible the tanks are still at about 82. Ideally one should be at about 78 and one about 79. I'm afraid if I turn the heaters off completely they'll get too cold. Is there anything I can do to lower the temps just a little bit? Do I need to get lower wattage heaters? Any other thoughts?