HTH® Pool Care Shock Ultra

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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
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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.