HTH® Pool Care Shock Ultra

Use this all-in-one powerhouse to quickly and easily increase chlorine levels, prevent bacteria, algae, stain and scale, reduce skin and eye irritation, improve filtration and soften your swimming pool water.

  • All-in-1 weekly Cal Hypo pool shock
  • Use weekly to solve 90% of pool water problems
  • Restores crystal clarity in 24 hours
No reviews

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 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.

How to use

HTH® Shock Ultra

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.