Jack I'm not running a Ca Reactor right now, when I did I followed the directions on the ARM container. I was lucky, with a 19BPM and a 1 or a 1/2 gph irrigation dripper my effluent pH was 7.48, (container said to set it at 7.5) My calcium level was perfect. I'm building a Ca reactor again, for the big tank, and I'll use a Kalk dripper as well more than likely.
Doug
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