PoolRx 331055 PoolRx+ Mineral AlgaecideFor up to 6-Month Algae Control for 400-1K gals PoolRx+ contains a proprietary blend of minerals that continuously and effectively eliminate algae. The specially treated alloy cylinder is packed with PoolRx+ granular formulation. These minerals immediately dissolve out of the cylinder and form a stable residual throughout the pool water for up to 6 months. The minerals eliminate the algae while freeing up low levels of chlorine to be more active and productive in the water. During the pool’s filtration process, the minerals are rejuvenated every time they return and pass through the cylinder. PoolRx+ works synergistically with a constant low level of chlorine. Treats 400 – 1000 gallons Simplifies Spa Care SDS Sheet Specifications: Brand: PoolRx Application: Spa Shipping Dimensions: 8 x 6.25 x 2 inch Commercial, Residential, or Professional: Residential Weight: 0.2 pounds UPC Code: 700553310556 Active Ingredients: Copper Sulphate Pentahydrate: 86.85% Zinc Sulfate Monohydrate: 1.51% Silver Nitrate: 0.40% Other Ingredients: 11.24%