Pool Rx Plus Black Algaecide Unit Treats 7500 - 20000 Gallon Swimming Pool

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Product Description

Plus] is the updated algaecide formula from  contains three active ingredients . Copper Sulphate . Zinc Sulfate and Silver Nitrate . adding additional layers of protection to the original formula you have come to trust. The black  pool unit is an EPA Registered . NSF/ANSI 50 Certified . swimming pool algaecide supporting 20k-30K gallons of water.  reduces chemical demand . improves water quality . simplifying pool care for up to 6 months. The  pool unit is effective in rejuvenating the minerals for up to 1 year in your pool. For best results . start with a new pool unit at the beginning of each swim season. For year-round pool use . add a booster after 6 months . or if you see algae coming back sooner.  products can support any size body of water & are ideal for use in Chlorine . Salt . UV or Ozone pools.