HTH™ Pool Care Calcium Up: Hardness Increaser for Pools
HTH™ Pool Calcium Up helps protect your pool from the damaging effects of low calcium hardness. When pool water lacks sufficient calcium, it can become corrosive and eat away at metal, vinyl, and even concrete surfaces.
- This powerful pool calcium up formula safely raises hardness levels to keep your pool water balanced, equipment protected, and swimmers comfortable.
- Perfect for all pool types, including saltwater and vinyl-lined systems.
- HTH™ Calcium Up helps you maintain strong, healthy water chemistry with confidence. Because when your water is balanced, you’re ready for anything.
You're all clear with HTH™
Balanced Pool Protection
Raises calcium hardness to prevent corrosive water that can damage pool surfaces and equipment.
Prolongs Pool and Equipment Life—
Helps extend the life of pool liners, pumps, filters, and heaters through balanced water chemistry.
Easy Application
Fast-dissolving granules make it simple to raise calcium hardness quickly and evenly.
Prolongs Pool and Equipment Life
Helps extend the life of pool liners, pumps, filters, and heaters through balanced water chemistry.
How to use
HTH™ Calcium Up: Hardness Increaser for Pools
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.