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New pool owner first post Let me start with the needed info 15,000 gallon IG vinyl Hayward super pump DE filter Jandy lite 2 heater TC 4.5 FC 5.0 PH 6.6 TA 120 CH 300 CYA 150 Copper 0.54 My pool is about years old. Might first issue is the CYA. I believe my only course of action is to...