What's your water temperature? I've heard that CYA does not properly register in tests until the water temp is above a certain temp (can't recall what that is though, maybe 60-65?).
 
					
					
						What's your water temperature? I've heard that CYA does not properly register in tests until the water temp is above a certain temp (can't recall what that is though, maybe 60-65?).
IG 30,000 gal vinyl
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