HTH 8.2 lbs. Pool Care Green to Blue Advanced
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Fight a severe algae bloom and restore your pool to crystal clarity in 24-hours. This 2-step shock treatment is designed to shock your pool with a boost of chlorine to kill bacteria and algae, then drops dead algae particles to the pool floor with a flocculent for clear, healthy swimming pool conditions. This pool shock is great for all pool types and won't fade your pool liner. This is not designed for pools that cannot vacuum to waste.