Clorox POOL & Spa Shock XtraBlue 36006CLX Pool Chemical, 1 lb Bottle, Chlorine

Dissolves quickly and remove organic contaminants that cause dull, cloudy water and other problems. Kills and controls green, black and mustard algae. Also kills bacteria. Reduces chlorine odor and eye irritation. Improves filter performance. Won't impact pH. Treat and swim in 15 min.