SpaChoice 25-Pound Premium Calcium Hardness Increaser for Pools

Balanced pool water starts with proper calcium hardness

SpaChoice 25-Pound Premium Calcium Hardness Increaser helps you quickly elevate total calcium hardness in your pool, supporting overall water balance and protecting surfaces. This dry, granular formula is designed to work with your existing test kit to reach the recommended ranges for different pool types. By aiming for the right hardness, you can reduce common balance issues and keep your pool looking and performing its best.

Key benefits at a glance

• Calcium chloride-based formula designed for pool use
• Rapidly increases total hardness to help protect surfaces and equipment
• Target hardness ranges support different pool surfaces (vinyl, tile, plaster, fiberglass)
• Low hardness can lead to issues, while proper hardness supports overall water quality

Ideal calcium hardness ranges by pool type

• Vinyl Pools: 200–300 ppm
• Tile and Exposed Aggregate Pools: 200–400 ppm
• Marcite, Fiberglass, or Painted Pools: 250–400 ppm

How to use SpaChoice calcium hardness increaser

When testing shows hardness below the target range, follow the dilution and distribution steps to avoid shock to the system. Start with a measured approach and monitor results with your test kit and circulating pump running.

• Test your pool water with a reliable test kit to determine the need for adjustment
• Dissolve up to 2 pounds of product per approximately 5-gallon bucket of pool water
• Slowly pour the dissolved solution around the pool perimeter while the circulation system is operating
• For larger pools, such as 10,000 gallons, limit additions to no more than 10 pounds per 2 hours

What to expect and practical tips

Each 8 ounces of the product can raise calcium hardness by about 10 ppm in a 5,000-gallon scenario. Results can vary with your water chemistry and usage patterns, so gradual adjustments and re-testing are advised. This product is intended to help reach the desired hardness range and reduce typical balance-related concerns, without making guarantees about results.

Store and handle according to label directions, and keep away from moisture to preserve effectiveness. Regular testing remains the best way to confirm when adjustments are needed and to maintain a comfortable, balanced pool environment.