Coraline and sand notwithstanding (which I assume is a big part of course) I would still have expected you to need to dial up your reactor, without an increased coral load, because the ratio of reactor turnover to tank volume has decreased significantly. This may be a bit of an oversimplification, but think of it this way: If it takes a given density of calcium and carbonate ions in the water column, simply increasing the volume equates into "needing more ions" to maintain the same density. No?
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-- Tony
My next hobby will be flooding my basement while repeatedly banging my head against a brick wall and tearing up $100 bills. Whee!
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