Pool Rx Plus Black Algaecide Unit Treats 20,000 – 30,000 Gallon Swimming Pool

PoolRx™ Plus Black Unit 20,000 – 30,000 Gallons 6-Month Algaecide w/ Silver – (Various Amounts). PoolRx+ contains a proprietary blend of minerals that continuously and effectively eliminate algae. The minerals eliminate the algae while freeing up low levels of chlorine to be more active and productive in the water.