Get your swimming pool ready for summer with the 4 Piece Crystal-Aqua Swimming Pool Opening Kit! This comprehensive kit includes everything you need to open your pool and get it sparkling clean for a summer of fun. The kit includes shock treatment to eliminate bacteria and other contaminants algaecide to prevent the growth of algae and a clarifier to keep your water crystal clear. Details: Treats up to 25,000 gallons of water Have a clear algae-free swimming pool this summer with just a few simple steps Intended for swimming pool treatment only Contents: 2 gal.of shock 1 gal. of algaecide 1 gal. of clarifier