HTH Shock Treatment Granule is an effective and versatile pool treatment designed to sanitize, clarify, and eliminate bacteria and algae. This multi-purpose shock treatment ensures your pool water stays clean and clear without the risk of over-stabilizing it. Formulated with 52% calcium hypochlorite and 48% other ingredients, it delivers 49% available chlorine for powerful sanitization. Convenient and easy to use, this granule form pool shock is available in various sizes and packaging options to suit your needs. Model Number: 52004