Low Calcium and chemical mystery question

There could be a difference here with what type of corals individuals are keeping.

I know one of my old reference books had different recommended Ca llevels for different Corals. I believe it gave 400+ppm for most SPS corals, 100 to 200 ppm for most Softies, and 200 to 300 for most LPS's.

I would think that Alk should be somewhat proportunate to the Calcium level.

Dennis
 
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