P/N: Q LeisureTime Spa Algaecide 32 oz Non-foaming algaecide kills and prevents all types of algae and slime growth. Features: Non-foaming Highly effective EPA registered Applications: Initial Treatment: 1. For visible algae growth or slimy interior surface, add 6-8 oz. per 500 gallon capacity. 2. For heavy algae growth, drain spa and clean prior to treatment. Maintenance: Add 1-2 oz. per 500 gallons every 5-7 days. Tips: Regular use will not only destroy existing algae but will also keep new algae from forming. Compatible With: Chlorine, bromine, ozone and biguanide sanitizers.