HTH® Pool Care Chlorine Granules Ultra

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Get the ultimate in pool care convenience with this all-in-one Cal Hypo formula. It sanitizes, controls algae, clarifies, softens pool water and even prevents stain and scale to keep your pool clean, clear and ready for summer fun.

  • All-in-one sanitizer and shock treatment
  • Kills bacteria and algae
  • Softens, clarifies and prevents stain and scale
  • Visibly sparkling blue water in 24 hours
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Visibly brilliant sparkle

This Cal Hypo based formula sanitizes and shock treats without adding cyanuric acid (CYA) to prevent overstabilizaiton or chlorine lock.

Multifunctional, fast acting

The all-in-1 pool treatment has built-in algae control, pool water clarifier, stain and scale preventer, water softener and filter aid—all with visible sparkling blue results in 24 hours!

Compatible with all 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 HTH® 6-Way Test Strips twice weekly to test and balance your swimming pool water and keep chlorine levels between 1 and 4 ppm.

How to use

HTH® Chlorine Granules Ultra

1. Measure Correct Dosage

Follow the on-pack instructions according to the size of your pool. Make sure to use a clean, dry scoop.

Follow the on-pack instructions according to the size of your pool. Make sure to use a clean, dry scoop.

2. Apply Directly To Pool Water

While the filter pump is running during the evening, apply chlorine granules evenly over a wide area in the deepest part of the pool. Use a brush to disperse any granules that fall to the bottom of the pool.

While the filter pump is running during the evening, apply chlorine granules evenly over a wide area in the deepest part of the pool. Use a brush to disperse any granules that fall to the bottom of the pool.

3. Test Free Available Chlorine (FAC)

After granules have dissolved completely, use HTH® 6-Way Test Strips to test FAC. Do not enter your pool until the free available chlorine residual is 1 to 4 ppm (parts per million).

After granules have dissolved completely, use HTH® 6-Way Test Strips to test FAC. Do not enter your pool until the free available chlorine residual is 1 to 4 ppm (parts per million).