My sump is only a 10 gallon. So with the baffles in there, I would only have at most 8-9" of space and the heater is about 13" tall 
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Started 03/2006 46 Gallon, Aqua C Remora w/ Maxi-Jet 1200, 2 Hydor Koralia #1, Penguin Bio-Wheel 200 Filter (w/ no Bio-Wheel), 65 lbs live rock, 60 lbs live sand, Coralife 36" Lunar Aqualight 2x96w with LEDs. LIVESTOCK Fish: 2 false perculas, 1 Coral Beauty, 1 diamond goby Inverts: 10 hermit crabs, 2 nassarius snails, 7 turbo snails, 1 electric blue crab, 1 skunk cleaner shrimp. Corals: Colt Coral |