Recently I tested the water in my frag/QT tank. I have 1 stylophora, 1 birds nest, 1 chalice and 3 zoa frags in there. Yesterday morning, my dkH was at 6.4, Ca was 390, Mg was 1400. I dosed dKH and CA and re tested a few hours later. The re test showed 7.8 dKH, Ca 460 and Mg 1400. To see what the levels did in 24 hours, I tested again tonight 24 hours later without dosing to see consumption. They read 7dKH, 440 Ca, and 1600 Mg. Could dosing dKH and Ca from Red Sea cause the rise in Mg? I've dosed dKH and Ca in the past with this same result. Re tested a day later and it was back to 1400. I didn't test twice tonight, but I tested twice the last time it happened. Any idea what Is happening here? My Ph has been steady at 8.2 every test.