Advice? Alk depletion, Ca high

I am dosing Reef Fusion 1 & 2 to maintain Alk and Ca, and testing with Hanna checkers. The strange thing is I am always adding #2 to hold Alk around 10 dKh, but Ca is always in the 530-540 ppm range. It has been months since I've added #1. I'm not really sure where the alk can be going if the Ca isn't also being depleted. Not sure what Mg measurement is, it is supposedly part of the #1 solution, so that hasn't been getting dosed either. I have a test kit ordered, and new reagents for the checkers (I noticed floaters in the Alk reagent, maybe it is contaminated and giving bad readings)
Everything seems healthy, but not seeing much SPS growth either, except for the various montis which are doing very well. Might toss the Fusion, and go with BRS 2-part soon