One of them has a chlorine neutralizer in it, the other doesn't. I cannot remember offhand which is which.
Re: Phenol red indicator question
One of them has a chlorine neutralizer in it, the other doesn't. I cannot remember offhand which is which.
Oval 12.5K gal AGP; Hayward 19" sand filter; Pentair Dyn 1 HP 2sp pump on timer
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