Pool Mate calcium hardness powder packaging showing granules ready for use to raise pool hardness
Pool Mate dry granules being poured into a bucket for dilution
Pool Mate granules dissolving in water in a bucket for correct dosing
Pool Mate solution poured around pool perimeter while circulation runs to distribute evenly
Hardness chart showing target calcium levels for different pool surfaces
Pool Mate helps protect pool surfaces by maintaining optimal calcium hardness

Pool Mate

Pool Mate 16-Pounds Premium Calcium Hardness Increaser for Pools | 100% Calcium Chloride

High-performance patio lawn and garden made for confident daily results

$47.43

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Why customers choose Cera Garden

Overview

Pool Mate 16-Pounds Premium Calcium Hardness Increaser for Pools is a dry granular formula designed to raise total hardness in pool water to the recommended ranges. It uses 100 percent calcium chloride and dissolves for even distribution with your circulating system. This product is engineered to support balanced water chemistry and help protect surfaces when hardness levels are low.

Maintaining proper calcium hardness helps protect pool surfaces and equipment from damage that can occur when water is too soft. If your test shows low hardness, adjusting the level with this product may help stabilize your chemistry and support long term performance.

Target ranges by surface

  • Vinyl pools 200–300 ppm
  • Tile and exposed aggregate 200–400 ppm
  • Marcite, fiberglass, or painted surfaces 250–400 ppm

Key benefits

  • Rapidly increases total hardness in pool water
  • Helps protect surfaces and equipment when hardness is low
  • Simple bucket dosing and even distribution with the circulating system
  • Aids in maintaining a stable calcium hardness for better water balance

What the product can deliver

  • 8 ounces raises calcium hardness by about 10 ppm in a 5,000 gallon volume
  • Suitable for regular maintenance as part of a balanced pool chemistry plan

How to use

  • Test calcium hardness with a reliable test kit before application
  • Place the dry product into a plastic bucket filled with pool water, mixing gradually in a ratio up to 2 pounds per approximately 5 gallons of water
  • With the pool pump running, slowly pour the solution around the pool perimeter to promote even distribution
  • For a 10,000 gallon pool, avoid adding more than 10 pounds within a 2 hour period

Tips for best results keep the hardness within the target range and re test after dosing. Follow the dosing chart included with the product for reference. Real world use often involves adjusting after water changes or seasonal shifts, so re testing helps confirm progress and keep balance steady.

Storage and handling

Store in a cool, dry place away from moisture. Use protective gear when handling granules and keep out of reach of children.

FAQ

Q: What does Pool Mate 16-Pounds Premium Calcium Hardness Increaser do?

A: Raises calcium hardness in pool water to help protect surfaces and equipment when tests show low levels.

Q: How should I apply Pool Mate safely?

A: Dissolve in a bucket of pool water, then slowly distribute around the pool while the pump runs; re-test after dosing.

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