FreshWater Vanishing Act XL Calcium Remover Category_Thermostat and other systems using this

and other systems using this cartridge

and other organic matter may not be significantly affected by Stain Magnet

and other equipment from scale accumulation

this is the algaecide to use — and BioGuard says so specifically

Quick and easy assembly

FreshWater Vanishing Act XL Calcium Remover Category_Thermostat and other systems using thisThe 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