PoolRx Blue 6-Month Swimming Pool Mineral Algaecide, 1 Tablet Treats 7.5k-20k Gallons Original Formula

Pool Rx is the powerful, original formula from the trusted Pool Rx brand. This breakthrough algaecide provides unmatched protection for your pool. The EPA Registered and NSF/ANSI 50 Certified Pool Rx Blue unit supports 7,500 to 20,000 gallons of water, keeping your pool crystal clear and healthy. By reducing chemical demand and improving water quality, Pool Rx simplifies your pool care routine for up to 6 months. For optimal results, start each swim season with a new Pool Rx unit. If you enjoy your pool year-round, simply add a Pool Rx booster after 6 months or at the first sign of algae. The Pool Rx system is designed to rejuvenate its minerals for a full year, providing long-lasting performance. Plus, it's compatible with any size pool using Chlorine, Salt, UV, or Ozone sanitizing systems. Upgrade to Pool Rx for a cleaner, safer, and easier-to-maintain pool. Say goodbye to algae and hello to a season of worry-free swimming! specially treated alloy cylinder is packed with the Pool Rx mineral 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 pools filtration process the minerals are rejuvenated every time they return and pass through the cylinder. Pool Rx works synergistically with a constant low level of chlorine. Residential (0.5-1.0ppm); Commercial