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Anonymous
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dadstank":mchxzoij said:i used to use the calcium but i killed two leathers and a HUGE green star polyp colony...
Just to add to Dan's wisdom - If you only dosed Calcium then you'll eventually end up with a severe imbalance with very low Alkalinity and very high Calcium. Without a good ALK level (Carbonate) corals are unable to use the Calcium and cannot grow. Typically a coral that isn't growing is dying and that could be what happened to your leathers.