I run both a Kalk Reactor and a Calcium Reactor. It keeps the Calcium levels high, alkalinity balanced and the PH controlled (because Kalk and Calcium effluent has opposite effects on PH) I find this the best way to control the Ph while keeping Calcium levels up for SPS and other calcium rich life (clams etc). I'm using Precision Marine gear for both. Oh, and if you like the "set and forget" stuff, this is a great way to go. I just add some Kalk powder every 2 to 3 weeks.
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"what do you mean you need another tank??"
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