Ok i got everything but alkalinity under control..FC-4 CYA-60 PH-7.6 CH-250 SALT-3100 ALK-200..ALK started out at 220 and i have added 12oz of Dry Acid 5 times checking to make sure PH was dropping down to 7.0-7.2 each time then aerating water back up to normal. 5 doses have only dropped ALK 20 points. Am i doing something wrong? Pool Calc says it should have dropped 45 to 50.