Dive into crystal-clear waters with the Crystal Clear Chlorine Shock 70% by Curchem. This powerful chlorine treatment is your go-to for banishing algae and bio-film, leaving your pool pristine. The 3-15 size mesh granules ensure quick dissolving action, making water treatment a breeze. Not just for pools, this chlorine is all about that sparkling clean life - just not for fish tanks, okay?