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GLB Calcium Hardness Up, 15 lb Bag
GLB Calcium Hardness Up, 15 lb , maintained at 150-250 ppm, One pound increases calcium hardness 10 ppm in 10,000 gallons of water, Compatible with chlorine, bromine, mineral purification systems, salt water chlorine and ozone sanitizing systems. Technical specifications and specific features include: Weight: 15.6 kg.