Nah, I prepped the sponge for 2 months beforehand, and knew it would be enough to filter things until the rock built bacteria. This is why I don't buy into the "wait for a year before SPS" line. I added 50 frags day one and all my fish into a system with a crappy skimmer, no reactor and dry rock/sand. Big water changes every two weeks, and everything stayed very healthy the whole process.
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Brad
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