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Your cart is empty.This is a dry granular product that increases the total hardness in pool water to the recommended range.Test for calcium hardness with a reliable test kit. The desired range for calcium hardness is as follows: Vinyl Pools: 200-300 ppm, Tile and Exposed Aggregate Pools: 200-400 ppm, Marcite, Fiberglass or Painted Pools: 250-400 ppm. If the calcium hardness tests less than the desired range, add this product according to the included chart. Place this product into a plastic bucket already filled with swimming pool water. Do this in a ration of up to 2 pounds of product per approximate 5-gallon bucket of water. Slowly pour this solution around the perimeter of the swimming pool while the circulating system is operating. In a 10,000 gallon pool, do not add more than 10 pounds of this product per 2 hour period.
GAK, PhD
Reviewed in the United States on June 3, 2025
Best prices and stabilized the pool.
Shelley
Reviewed in the United States on August 30, 2024
The product seems ok. The packaging and/or delivery was a failure. The bucket was opened and the product spilled out into the box. No packaging fillers were included in the box and the bucket had a lot of room to move around inside it.
Cah13
Reviewed in the United States on August 2, 2024
Good price does the job dissolves well a little messy with the screw on lid but keeps the pool going
Ralph E.
Reviewed in the United States on July 18, 2024
It did the job to raise the hardness
Customer
Reviewed in the United States on July 18, 2024
Product served it's purpose!!!
LRA
Reviewed in the United States on May 11, 2024
Half the price of our pool store and did the job.
roy v brannan
Reviewed in the United States on December 9, 2024
Reasonably prices calcium for balancing the chemicals in my pool.
Timothy J. Laczek
Reviewed in the United States on October 2, 2024
Cheaper than local pool store
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