Visibly brilliant sparkle
This Cal Hypo based formula sanitizes without adding cyanuric acid (CYA) to prevent overstabilization or chlorine lock.
Visible Blue Action
This built-in feature lets you know the product is working!
Compatible with all swimming pools
This pool super shock 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.

How to use
HTH™ Shock Ultra: Pool Super Shock
1. Add Directly To Water OR Skimmer
Follow the on-pack instructions according to your swimming pool size. Make sure to use a clean, dry scoop.
Follow the on-pack instructions according to your swimming pool size. Make sure to use a clean, dry scoop.
2. Repeat Weekly
For best results, use HTH™ Shock Ultra as part of your weekly pool care routine to keep free available chlorine levels between 1 and 4ppm.
For best results, use HTH™ Shock Ultra as part of your weekly pool care routine to keep free available chlorine levels between 1 and 4ppm.