Check the listing for details. Poolife Calcium Plus (8lb) 3 Pack. Condition: New. Listed at 46.99 USD. Poolife® Calcium Plus 8lb 3 Pack Part #62156/3Product DetailsPoolife Calcium Plus is a granular form of calcium chloride, used to increase your pool’s calcium hardness. When your pool’s calcium hardness falls below 200 ppm., it can damage your pool’s surface and equipment. Poolife Calcium Plus is essential for maintaining proper water balance, as well as protecting your pool’s surface and equipment.Product Benefits:While water is circulating, broadcast product over the deep end of the poolIf you prefer to pre-dissolve, add liquid near return line of facilitate dispersal of chemicalBe sure to use a clean bucket and utensil for mixingDosage/Frequency:The recommended range for calcium hardness is 200 – 1000 ppmAdding 4 lbs. of Poolife Calcium Plus per 10,000 gallons of pool water will increase calcium hardness by 50 ppmReturns are not accepted on opened or used products and are subject to a 10% restocking fee if returned without an RMA/RGAIf you have any questions, please contact Clearview Fireplace and PatioWe would be happy to help Disclaimer: I will follow all applicable federal and state laws and regulations regarding the sale of the pesticideI won’t accept bids from, sell to, or ship to states in which the pesticide is not registered as a general-use product