So I have been balancing my pool after the pool guy hired by previous owner mucked it up. Had to do a water swap to get CYA down from 150. My well water I used is VERY soft with a calcium level of 25. Used app to add CaCl and got it to 200. Added recommended amount to go to 220 and stayed 200. A week later now 175. We have had some rain but I don’t have a leave and no one is swimming right now. Anyone have any idea why Ca level is dropping?