GLB Supersonic 1lb. (Pack of 12)

Fighting a green pool, stubborn algae, or cloudy water that keeps coming back? The GLB Supersonic Pool Shock 12 Pack is built for pool owners who need serious water recovery power — whether you’re opening your pool for the season or maintaining crystal clear water all summer long. This high-performance chlorine shock rapidly dissolves to eliminate algae, oxidize contaminants, and restore sanitizer effectiveness so your pool stays clean, clear, and swim-ready. Built to Solve Major Pool Water Problems A single shock treatment often isn’t enough for problem pools. This 12-pack gives you the volume needed to fully correct water issues and maintain balance. Ideal for: Green or swampy pool water Severe algae blooms (green, mustard, black) Cloudy or hazy water Pool openings after winter Heavy rain & storm contamination High swimmer load recovery When water conditions are at their worst, Supersonic works fast to bring them back under control. Supersonic Fast-Dissolving Perf