Is a 3 degree change in temp a bad thing? Mine goes from 79 to 82 as the MH heat up. During the winter it never fluctuated that much, but I can't run the AC all day.
well ive been told its not a great idea i had 5 degree swing and started loosing corals to have a small swing is ok, i added 2 fans on mine from walmart their massy 4" high velocity fans only cost a few bucks, do a better job than the square aquarium fans and soooo much quieter
My temp will swing a few degrees sometimes but i agree with everyone above a few degrees no problem. But 5 degrees is pushing it and i wouldnt let it swing anymore then that.