MY CYA is between 90-100, through being pool stored and told to add to much stabilizer as well as having been using TriChlor pucks. Pool was just resurfaced in May so fresh fill at that time. Issues I am seeing are going from FC of 8.5 to 5 daily, which means I am adding 1 gallon of 10% Liquid Chlorine nightly ( may not need exactly 1 gallon but I am working to get closer to a FC of 10). It would seem that with this high of a CYA I wouldn't lose this much in a days time but that's what the FAS-DPD test is telling me. I know I need to get the CYA down to 50 but having just filled the pool ( 24,000 gallons) a couple of months ago I am trying to get to the fall/winter months without draining what appears to be will need to be 40 - 50% of the water. The other issue I am having is that we are seeing significant calcium build up on our grout lines. Our Calcium is about 350, not bad considering it's 250 - 300 out of the faucet here in Mesa, AZ. I am just surprised to see what appears to be a significant calcium issue in this short of a time period. I might add the pool looks great, crystal clear water, PH is being maintained at 7.3 - 7.8 with Muriatic Acid, although TA a week ago was running 140. I have been working to reduce this through adding acid and aerating. In summation I guess my main concerns are: 1) Is this amount of FC loss normal. 2) is there something I may be missing which is leading to my Calcium issues?