:i have a ten gallon tank for my leo and an under the tank heater...i have noticed that during the day its right aroud 88-90 but at night its sill like 86-88..i have read that it should drop into the low 80's or high 70's...how is this possible with a UTH? and is it a bad thing for my tak to be that 86-88 at night? i just got my first leo a week ago and still trying to figure everything out so any help would be nice