Shock treat, sanitize, clarify and help prevent bacteria and algae in your swimming pool water, all with this convenient, easy-to-use product.

Multi-use pool shock with Cal Hypo
Use weekly to solve 90% of pool water problems
Fast-acting and fast-dissolving

Visibly brilliant sparkle
This Cal Hypo based formula sanitizes without adding cyanuric acid (CYA) to prevent overstabilization or chlorine lock.

Compatible with all swimming pools
This product is great for all pool types including vinyl-lined pools and salt water systems.

You’re all clear with HTH®
For best results, use with HTH® 6-Way Test Strips to test and balance your swimming pool water twice weekly.