R33F FeTiSh
Aquarium Advice Regular
For your temp problem you could use one of those maxi12's as a return. My tank ran at 80 with a desktop fan and the front lid and back lid opened. I got a maxi and switched them. It stays at 77 all day. Sometimes 75, depending on the ambient temp. Still have the lids and fan the same, when it was all closed up it reached 83 often. Higher temps promote nuisance algae growth. It makes your fish less active as well.