Is CC what determines if you need to shock ? And what is the normal reading if you don't need to shock? again Thanks Jerry
Re: spring startup
Is CC what determines if you need to shock ? And what is the normal reading if you don't need to shock? again Thanks Jerry
Fiberglass in ground, outdoor 6500 gal; Hayward chlorine dispenser, cartridge filter, & 1 HP pump; 10 years old
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