Pool RX 101001 6 Month Algaecide Blue Treats 7.5k-20k gallons + HTH 52036 Swimming Pool Care Shock Advanced, Swimming Pool Chemical, Cal Hypo Formula, (6 pack)

6 month algaecide eliminates all types of algae, reduces chemical demand, effective for up to 6 months and simplifies pool care (Pool RX 101001)Fast-dissolving, convenient 4-in-1 formula kills bacteria and...