Well it's that time to open the pool,and took my first reading.Here there are,now I need help with the cya.I have an oval 18x33 AG VINYL liner not sure of the gallons.I tested with bens kit # ps 233 and the Black dot never did go away.I need all the help I can get to have a clean pool.Also can someone help me understand how to use the bleach calulator
thanks
FC 6
CC 0.5
TC 5-10
PH 7.6
CYA 0
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