Waters Choice Spa Water Polish Monthly Enzyme Treatment 12 Ounces Natural Alternative to Chemicals Safe and Effective; Saves Time, Money, and Water from Fewer Drain and Refills Uses Enzymes to Minimize Chlorine Use and Other Harsh Chemicals Does Not Affect pH or Water Chemistry, Easy Monthly Maintenance Add 1 Bottle per Month of Pure Enzymes for Spas (formerly Spa Water Polish) for Clean, Clear Water