In The Swim Pool Alkalinity Increaser 25 lb. Pail
Proper alkalinity levels make your pH and chlorine levels easier to control.  Use alkalinity increaser when total alkalinity drops below 80 ppm.  Proper alkalinity range is 80-120 ppm.  The product is granular and is chemically known as Sodium Bicarbonate.  Dosage: 1 1/2 pounds per 10,000 gallons will raise the alkalinity level approximately 10 ppm.Spa Dosage: 1-2 oz. per 500 gallons.