Pristine Check – 64 oz by PristineBlue

PristineCheck is a water prep. It is added to pools and spas before the introduction of PristineBlue to sequester calcium and other minerals for maximum effectiveness.

For pools: add 2 ounces per 1,000 gallons
For spas: add 10 milliliters per 100 gallons, in swim spas add 2 ounces per 1,000 gallons