HTH® Pool Care Shock Advanced 12 pack x 1 lb.

Stay all clear for cannonballs! This fast-dissolving, convenient 4-in-1 formula kills bacteria and algae, reduces chlorine odor and irritation and quickly restores crystal clarity.

Multi-functional shock treatment for weekly use
Use weekly to solve 90% of pool water problems
Restores crystal clarity in 24 hours

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 saltwater 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.