HTH® Pool Care Calcium Up

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Raise the calcium hardness of your swimming pool water to protect your pool surfaces and equipment from harm.

  • Protects pool surfaces
  • Helps chlorine to work efficiently
  • Prevents equipment damage
  • Compatible with all swimming pools

Raises calcium hardness levels

Helps prevent swimming pool water from becoming corrosive.

Protects & prevents corrosion

Protects pool liners, metal and plastic surfaces as well as equipment from damage.

You’re all clear with HTH®

For best results, use HTH® 6-Way Test Strips weekly to test, balance and maintain calcium hardness levels between 200 and 500 ppm.

How to use

HTH® Calcium Up

1. Test Your Pool Water

Use HTH® 6-Way Test Strips or Test Kit.

Use HTH® 6-Way Test Strips or Test Kit.

2. Apply HTH® Calcium Up

If the calcium hardness level measures below 200, apply directly to your swimming pool and swim!

If the calcium hardness level measures below 200, apply directly to your swimming pool and swim!

3. Test & Balance Weekly

Calcium hardness should be maintained between 200 and 500 ppm.

Calcium hardness should be maintained between 200 and 500 ppm.