Top 9 Calcium Hardness Increaser for Pool – Swimming Pool Balancers

As an Amazon Associate I earn from qualifying purchases.

1. Pool Mate


25-Pounds Bag, Pool Mate 1-2825B Pool Calcium Increaser

Pool Mate #ad - Increases water hardness. Low calcium hardness level can cause water issues. Ideal calcium hardness range 200 - 400ppm. Prevents the staining or etching of your pool's surface.
BrandPool Mate #ad
ManufacturerPool Mate #ad
Height12 Inches
Length12 Inches
Weight25 Pounds
Width10 Inches
Part Number1-2825B

2. Clorox Pool&Spa


White, Clorox Pool&Spa 12204CLX Calcium Hardness Increaser, 4 lb

Clorox Pool&Spa #ad - Ideal for plaster pools and soft water areas. Prevents corrosion, etching, and staining. Increases low Total Hardness levels in swimming pool water. For best results, use with the Clorox Pool app. Power source Type: Manual. Prevents pool surface damage.
BrandClorox Pool&Spa #ad
ManufacturerClorox® Pool&Spa™ #ad
Height11.5 Inches
Length4.4 Inches
Weight4 Pounds
Width10 Inches
Part Number12204CLX

3. In the Swim


25 Pound Bucket, In The Swim Pool Calcium Hardness Increaser

In the Swim #ad - Prevents aggressive or corrosive water. Average 97% Calcium Chloride. Dosage 6 lbs per 10, 000 gallons to raise calcium hardness level about 50 ppm. Do not pre mix. Increases calcium hardness level.
BrandIn the Swim #ad
ManufacturerIn The Swim #ad
Height11.1 Inches
Length12.6 Inches
Weight2.63 Pounds
Width12.6 Inches
Part NumberY7210

4. Robelle


Robelle 2825B Pool Calcium Increaser, 25-Pounds Bag

Robelle #ad - Ideal calcium hardness range 200 - 400ppm. Increases water hardness. Prevents the staining or etching of your pool's surface. Low calcium hardness level can cause corrosive water.
BrandRobelle #ad
ManufacturerRobelle #ad
Height12 Inches
Length12 Inches
Weight25 Pounds
Width10 Inches
Part Number2825B

5. Doheny's


Doheny's Calcium Plus | Raise Your Calcium Hardness Level | Pro-Grade Granular/Flake Calcium Chloride | Low Calcium Hardness Levels Lead to Corrosion & Staining On Pool Surfaces and Fixtures | 25 LB

Doheny's #ad - Pool calcium hardness increaser: Proper Calcium Hardness levels increase the effectiveness of your other pool chemicals. Ingredients: made of 100% Granular Calcium Chloride. Calcium hardness increaser for Swimming Pools: Instantly increase the calcium hardness levels in your swimming pool. Packaging: 5-lb ready-to-use pouch or 25-pound bucket available. Benefits of doheny's calcium Plus: Balanced Calcium Hardness levels reduce equipment corrosion and staining in your swimming pool.
BrandDoheny's #ad
ManufacturerDoheny's #ad
Weight25 Pounds



Leisure Pool 50 lb. Calcium Hardness Increaser Calcium Chloride

LEISURE POOL & SPA SUPPLY INC. LP #ad - Per 10, 000 gallons will raise CH levels by 10 ppm. Other uses: ice melt, dust control, concrete acceLERATOR. Dosing instructions: 1. 1 lb. Calcium chloride dry granules commonly known as Calcium Hardness Increaser, will raise calcium hardness levels in commercial and residential swimming pools and spas.
ManufacturerLeisure Pool & Spa Supply, Inc. #ad
Height15 Inches
Length12 Inches
Width12 Inches

7. Quality Producer Direct


Calcium Hardness Increaser 1 Gallon Calcium Chloride Powder for Pools & Hot Tubs

Quality Producer Direct #ad - Used to prevent Corrosion in Pools & Hot Tubs. Manufactured in the USA. Calcium chloride anhydrous Powder Increases Total Hardness of Pool Water. Lab-tested & Certified. Great value: 1 gallon of Calcium Chloride Powder.
BrandQuality Producer Direct #ad
ManufacturerQuality Producer Direct #ad
Height7.5 Inches
Length7.47 Inches
Width7.47 Inches



Calcium Chloride Pool Hardness Increaser | Spa Calcium Hardness Increaser | Works for Pools Spa & Hot Tub, 10 Lbs

ECO LIVING SOLUTIONS #ad - This makes sure our customers get the best value from this purchase. Improves pool health - our calcium hardness increaser prevents corrosion of your swimming pool metal fittings, deters ugly rust stains, reduces scaly white buildup on the pool surfaces, and stops pinhole leaks in critical pool equipment.

Broadcast product over the entire water surface while the pump is running. All purpose water hardness increaser - Eco Living Solutions calcium hardness increaser works with all types of swimming pools and hot tubs. 1 lb of the eco living solutions pool Hardness increaser will increase 10PPM for a 10, 000 Gallon pool. Easy to use and store - our calcium hardness increaser comes with a shaker lid for easy application and storage. Add this product on the day when no other water treatment chemical has been added.

Do not pre-dissolve this product. Test water for hardness with a test kit or strip. Dissolves quickly - designed to dissolve quickly and work fast. Add this product on the day when no other water treatment chemical has been added. Pool use may resume 15 minutes after the product has fully dissolved. Best price to value - our calcium hardness increaser is made with highly concentrated premium calcium chloride flakes.
ManufacturerEco Garden Solutions #ad
Height11 Inches
Length7 Inches
Width7 Inches
Part NumberCHI10LBS

9. HTH


Swimming Pool Chemical Protects Swimming Pool Surfaces and Liners, HTH Pool Care Calcium Hardness Up, 4 Lbs

HTH #ad - Compatibility: Pool care chemical works with all swimming pools. 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. Benefits: raise the calcium hardness of your swimming pool water to protect your pool surfaces and equipment from harm. 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.
BrandHTH #ad
ManufacturerInnovative Water Care #ad
Height10.5 Inches
Length9 Inches
Weight4 Pounds
Width3.5 Inches
Part Number67059