Puri Tech 25 lb Calcium Hardness & Alkalinity Increaser Kit for Swimming Pools

Puri Tech Chemicals 25 lb Calcium Hardness Increaser & 25 lb Alkalinity Increaser Kit for Swimming Pools & Spas Balance Chemical Levels Keep Surfaces & Water Clean 2,000 Gallons: 1.5 Lbs to increase hardness 50ppm, 3 Lbs/100ppm, 6.25 Lbs/200ppm 5,000 Gallons: 3 Lbs to increase hardness 50ppm, 6.25 Lbs/100ppm, 12.5 Lbs/200ppm 10,000 Gallons: 6.25 Lbs to increase hardness 50ppm, 12.5 Lbs/100ppm, 25 Lbs/200ppm 20,000 Gallons: 10.5 Lbs to increase hardness 50ppm, 25 Lbs/100ppm, 50 Lbs/200ppm Calcium Chloride 1.5lbs per 10,000 gallons to raise total alkalinity level 10ppm. Spread over the deepest part of the pool and circulate pump a minimum of 4 hours. Sodium Hydrogen Carbonate