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choose the XL
Slow dissolving
Replacing the MegaChlor electrode will allow your salt chlorine generator to begin chlorinating again if your old MegaChlor electrode has been depleted
BioGuard Erase Iron Stain Remover is a granular treatment that lifts iron-based staining off pool surfaces — the rust-brown
FreshWater Vanishing Act XL Calcium Remover Category_Thermostat choose the XLThe FreshWater Vanishing Act XL Calcium Remover is the heavy duty version of the standard Vanishing Act, designed for spa owners filling from genuinely hard water sources. With three times the calcium binding capacity of the standard size, the XL handles fill water above 150 ppm in a single 72 hour treatment situations where a standard Vanishing Act would need multiple consecutive applications or simply wouldn't keep up. If you've measured your fill