I’m working to up the Ca, Mg and KH of my tank in preparation for adding corals. I’m starting with smaller frags so was hoping for a chemical level that would facilitate faster growth. I thought I’d try one of the Red Sea recipes recommended for exceptional growth. It calls for 465 ppm Ca, 1390 ppm Mg and 12 dKH. I had quite a ways to raise my levels to get there so I’ve been dosing supplements daily for the last week or so (Seachem reef builder for KH, Seachem reef advantage do Ca, and Red Sea foundation C for Mg. I’ve notice that the levels seem to have topped off at 400 ppm Ca, 1275 mg and about 10 dKH. When I add more of each supplement the Ca and Mg either stay about the same (or even go down?). And the KH seems to fluctuate. I had it up to 12 but has since dropped to 10. At any rate, can anyone tell me why I can’t get the levels up consistently to my target? I haven’t noticed any excess precipitate and my pH seems steady at about 8.3.