| Those clip on fans work great over sumps if you don't have much room. You could also get 1 or 2 small 3-4" fans and set them up on top of the tank blowing across the surface of the water, and make sure there's a place for fresh air to circulate in/out of the canopy. I had one 3" fan on one end of my tank, and my temp was still 82-93, then I played around with it and moved it to the middle of the tank just sitting on the eggcrate top, and my tank is now a stable 80 deg.
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Member "Crabs Are Evil" Society
My Tank:
90g AGA, 18g tall sump, CSS 220 w/ meshmod impeller, 4x54w Tek T5 retro w/ IC reflectors, Kalk reactor w/ aquamedic niveaumat system, a few SPS, LPS, zoos, and a few softies, 2 Ocellaris Clowns (hosted by both a RBTA and GBTA), Yellow Watchman, Potter's angel, Yellow Tang, Foxface, Midas Blenny, Purple Pseudo, huge brittle star, 2 tigertail cukes, fire shrimp, snails, and unfortunately two emerald crabs (the bubble algae got out of control).
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