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Yep. The old rule used to be 2lbs per gallon. My tank was pretty full!Looks beautiful; there's virtually no such thing as 'too much rock' unless it's either (1) jammed up so close to glass that glass-cleaning is not possible, (2) is stacked so high that upper corals will get bleached, or have no room to the top of the tank to grow, or (3) fish that need horizontal 'swim room' are being cramped / prevented.![]()