guess one of my fears is that I'll spend $60-$80 on one and it wont do all i need it to lol. The one I'm looking at is 80 watts. 12.5" x 22.5" x 1.75" that would go on the hotside longways with the 22" running front of the enclosure to the back. Thats why i got in mind anyway. Running on a thermostat of course. i want the enclosure itself to be 2' deep so i know that'll leave less then an inch in the front and back but I'm kinda ocd on making sure I've got plenty of heating options for her if there's a really cold winter or something oddball happens lol. would that be a little much ya think? like i said, only have experience with using the ceramic heaters. I just don't like the domes sticking out of the top of the tank lol.