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Originally Posted by Beverly
Newguy's tank is only 18" deep and a 250w halide would be overkill on a tank that shallow. 175w would be just fine for his tank, imo.
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No such thing as overkill!! I ran 2 400w 10k bulbs over my 18" tank. If clams/SPS are the intended inhabitants, more is always better. Bigger bulbs do bring heat managements issues though, so be prepared to deal with that.