BioGuard Balance Pak 300 Calcium Hardness Increaser 12lb Winter Closing 22 mm thick vinyl material

22 mm thick vinyl material

then retest before adding more to avoid overshooting and potential scale

Round head design follows the natural curves

LifeLine Liquid Stabilizer/Conditioner for Pools 1Gal (2600BGT) shields your chlorine from UV destruction

BioGuard Chem-Out Chlorine/Bromine Neutralizer 2lb (23647BIO) instantly tames over-shocked pools

BioGuard Balance Pak 300 Calcium Hardness Increaser 12lb Winter Closing 22 mm thick vinyl materialBioGuard Balance Pak 300 Calcium Hardness Increaser 12lb BioGuard Balance Pak 300 Calcium Hardness Increaser 12lb supercharges soft water to protect your pool from corrosion and keep swims silky smooth. Fortify Your Pool Against Soft Water Damage! This bulk 12lb granular calcium chloride from BioGuard's Balance Pak line quickly raises calcium hardness to the ideal 200 400 ppm range, preventing equipment erosion, liner wrinkling, and plaster etching.