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- Jun 16, 2015
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I have a 265 gallon with a 55 gallon sump that has 300lbs of dry rock that has been established for a year. I can't grow much of anything but zoanthids. There is just no life in the rock. I have 4 tangs a clown 4 chromes and 2 royal grammas. I want to take 75lbs of the dry rock out and put in 75lbs of gulf rock. Would it hurt to put the gulf rock straight in without curing it? Would the die off hurt it being its been established for a year? Would you do it?