PoolRx+ Mineral Algaecide 4-Unit Pack, up to 6-Month Algae Control, for 2.5K-5K gallons, Red & White, New Formula with Silver.

Eliminates all types of Pool AlgaeReduces chemical demandEPA Registered & NSF/ANSI 50 CertifiedEffective for up to 6 Months3 Active Ingredients Copper+Silver+Zinc