Did you run your chlorine tests more than once? I'd be a little suspicious of a CC reading of 4 unless you had a major swamp. Maybe retest again and see what you get.
Did you run your chlorine tests more than once? I'd be a little suspicious of a CC reading of 4 unless you had a major swamp. Maybe retest again and see what you get.
Just remember that it takes up to a week for cya to completely dissolve. So, don't retest for it or add any more during that time period.
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