Pool Place Calcium Hardness - 10 Lbs. Pool Tools_Skim Nets & Rakes It as a cushion between

It as a cushion between ladder base and pool liner and protects

Makes spring pool openings faster and easier

Spend less time testing and more time having fun with your family in the pool

The float is made of heavy-duty vinyl

Works with Octagon Spas: NO

Pool Place Calcium Hardness - 10 Lbs. Pool Tools_Skim Nets & Rakes It as a cushion betweenCalcium Hardness by The Pool Place is used to raise calcium hardness in swimming pool water. Low calcium hardness may cause pool water to become corrosive which can result in etched plaster, corrosion of equipment and fixtures or may cause metallic stains. The Ideal range is 200 to 400 parts per million (ppm). The minimum calcium hardness level is 150 ppm. DIRECTIONS FOR USE Test water for hardness with test kit or strip. If calcium hardness is below