Jack's Magic The Emerald Stuff 32oz.

Experience stunningly clear pool water with Jack's Magic The Emerald Stuff. This 4-in-1 clarifier not only removes microscopic contaminants, but also prevents scaling, staining, scum lines, and foaming. Compatible with all sanitizer systems, it cuts down on maintenance and leaves your pool with a jewel-like brilliance. Say goodbye to pool maintenance headaches with The Emerald Stuff.

1 fl oz per 5,000 gallons of water every 2 weeks.