I am having trouble getting my calcium level to raise. Currently moved to a smaller tank and did a very large water change to start out and am continuing to get a reading of 360 for the calcium...... I figured it would not take so much to get it back up and steady but, I have been adding calcium daily for a week and a half and something seems strang?????? I am dosing a 2 part B Ionic and some durbo cal. I have also added a little magnisum and still the level is low, I am constantly testing evry few days . It will raise and then go down. Is the rock using the up that much cal ????