Jack's Magic The Vinyl Liner Blue Stuff (1 qt) (4 Pack)
Brand: Jack's Magic

Jack's Magic The Vinyl Liner Blue Stuff is an easy, effective way to keep your vinyl-lined pool free of nasty metal staining and scale buildup. Its unique formula is designed specifically to work safely with vinyl liners, even those equipped with heaters, finally giving vinyl pool owners a full strength chemical to combat stain and scale buildup. Best of all, Vinyl Liner Blue Stuff is made by Jack's Magic, and industry innovator in pool chemicals, allowing you to buy with confidence.

Highly effective in all types of vinyl liner pools
Helps prevent metal stains (including copper) and scaling in new vinyl pools
Helps to remove metal stains and scale in older vinyl pools.
4 Pack