DryTec 1-1901 Calcium Hypochlorite Chlorinating Shock Treatment for Swimming Pools

Quiet, powerful suction cleaner; works with low-speed pumps for maximum efficiency.
Devours small and medium-sized debris and cleans floor, walls and steps of your entire pool.
36-Fin Disc increases adhesion to pool surface and avoids getting hung-up on lights, drains covers, fittings and other pool features.