Marine Depot posted a nice chart
http://www.marinedepot.com/reef-tank-parameters.html
http://www.marinedepot.com/reef-tank-parameters.html
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interesting that the alk recomended is 8-12 but ocean alk is 7
I know about the ph stability, but that "ionic relationship between Mag and Calc" is one I'm not familiar with. I have a lot to learn...