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Bacteria is not dependant on lighting. Nor do you need it for live rock in a sump. The ONLY reason you would HAVE to have light on the sump, is if you used it for macro algae. While some pods do prefer light/night cycles, it's not going to be a big issue.
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Secretary 2007
Vice President 2008
Central Oklahoma Marine Aquarium Society. ( C.O.M.A.S. )
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