Top 10 Hardness Plus for Swimming Pools – Swimming Pool Balancers

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1. Pool Mate


Pool Mate 1-2825 Calcium Increaser for Swimming Pools, 25-Pound

Pool Mate #ad - Prevents the staining or etching of your pool's surface. Ideal calcium hardness range 200 - 400ppm. Low calcium hardness level can cause corrosive water. Increases Water Hardness.
BrandPool Mate #ad
ManufacturerRobelle Industries #ad
Height11 Inches
Length10.25 Inches
Weight25 Pounds
Width10.25 Inches
Part Number1-2825

2. Puri Tech


Puri Tech Pool Chemicals 25 lb Calcium Hardness Increaser Plus for Swimming Pools & Spas Increases Calcium Hardness Levels Prevents Staining on Surfaces

Puri Tech #ad - 20, 3 lbs/100ppm, 12. 5 lbs/100ppm, 000 gallons: 3 lbs to increase hardness 50ppm, 6. 25 lbs/200ppm. Brand new packaging: all puri Tech Chemicals now come in resealable bags for easy storage! Active ingredients: Calcium Chloride.

10, 25 lbs/100ppm, 000 Gallons: 105 lbs to increase hardness 50ppm, 000 Gallons: 1. 5 lbs to increase hardness 50ppm, 000 Gallons: 6. 25 lbs to increase hardness 50ppm, 50 Lbs/200ppm. See package for instructions. Raises calcium in swimming pool water. Calcium hardness level prevents foaming, equipment and surface erosion and scaling. 5, 6. 25 lbs/100ppm, 12. 5 lbs/200ppm. Dosage: 2, 25 lbs/200ppm.
BrandPuri Tech #ad
ManufacturerPuri Tech #ad
Part NumberPCC

3. Natural Chemistry


Natural Chemistry 05121 Phos Free Pool Cleaner, 3-Liter

Natural Chemistry #ad - No phosphate build up, vacuuming, less filter Management, and reduces pool maintenance. Clear, perfect algae-free water, unconditionally. Enhances any sanitizer system and is 100-percent safe for family and environment. Phosphate-limiting pool additive to prevent algae growth.
BrandNatural Chemistry #ad
ManufacturerNatural Chemistry #ad
Height7 Inches
Length11 Inches
Weight7 Pounds
Width5 Inches
Part NumberB0002IXKS4

4. In The Swim


25 Pound Bucket, In The Swim Pool Calcium Hardness Increaser

In The Swim #ad - Average 97% Calcium Chloride. Do not pre mix. Dosage 6 lbs per 10, 000 gallons to raise calcium hardness level about 50 ppm. Prevents aggressive or corrosive water. Increases calcium hardness level.
BrandIn The Swim #ad
Height11.5 Inches
Length13.2 Inches
Weight25 Pounds
Width12.7 Inches
Part NumberY7210

5. Bare Ground Winter Bare Ground Solutions


40 lbs, Bare Ground Winter Bare Ground Solutions PCAL-40 CalPlus Calcium Increaser for Swimming Pools

Bare Ground Winter Bare Ground Solutions #ad - Brings soft pool water to a normal calcium hardness level. Keeps pool water in the ideal range of 200 - 400 ppm. Per 10, 000 gallons will raise hardness 10 ppm. Helps prevent corrosion, etching, and pitting of concrete surfaces as well as preventing the damage to pool and equipment caused by soft water. 1. 25 lbs. Scatter over the surface for quick and easy dissolving.
BrandBare Ground Winter Bare Ground Solutions #ad
ManufacturerBare Ground #ad
Height12 Inches
Length12 Inches
Weight40 Pounds
Width12 Inches
Part NumberPCAL-40

6. Clorox


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

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

7. Rx Clear


Rx Clear Calcium Plus | Granular Calcium Chloride | Raises Calcium in Swimming Pool Water | Hardness Increaser for Swimming Pools | Prevents Corrosion | 25 Lbs

Rx Clear #ad - When swimming pool chemicals are not at their ideal levels, and pool or spa equipment, the water can turn dull and cloudy, swimmers can be at risk of contracting illnesses and suffering from skin irritation, hoses, and surfaces can become damaged.

Prevents corrosion - rx clear calcium plus helps stop corrosion of metal surfaces such as light fixtures, railings, pool cover components, ladders, shotcrete, gunite, screws, and delamination of concrete, pool heater components, and metals in your pump or filter. The minimum calcium hardness level is 150 ppm. Dosage - the ideal range is 200 to 400 parts per million ppm. Also prevents etching, pitting, plaster, and fiberglass pools. Be aware - do not add this product on the same day that either ph plus or alkalinity increaser has been added to the pool water.

Spread the product over the surface of the water while the pump is running. Six lbs. Do not pre dissolve this product. Also helps prevent foaming of certain chemicals. Raising calcium hardness helps prevent corrosion of metal and plaster surfaces. Trust rx clear as the most reliable leader in pool cleaner products and supplies.
BrandRx Clear #ad
ManufacturerRx Clear #ad

8. JNW Direct


100 Strip Pack, Accurate 7-in-1 Swimming Pool Water Testing, Test pH, Chlorine, Hardness and More, Free App & Ebook Included, Bromine, JNW Direct Pool and Spa Test Strips

JNW Direct #ad - Simply dip and compare with large color chart on bottle. Ideal range marked on bottle. Extremely easy to use pool water test strips, instant reliable results with simple and clear instructions.

100 strips means 100 tests - each swimming pool test strip provides accurate and fast results for any water sources including fresh and salt water pools, spas and hot-tubs. Tests for 7 parameters: total hardness, bromine, pH, total chlorine, free chlorine, cyanuric acid stabilizer & total alkalinity. The ultimate at home pool test strips for your swimming pool & spa.

Bonus free mobile app included - Record, track and monitor your pool test strip results with ultimate accuracy. Available for IOS and Android. Get safe, clean and crystal clear water, our pool and spa test strips come with a great e-book explaining what your results mean and how you can keep your water in a healthy & clean condition year round.
BrandJNW Direct #ad
ManufacturerJNW Direct #ad

9. Pool Mate


Pool Mate 1-2257 Total Alkalinity Increaser for Swimming Pools, 25-Pound

Pool Mate #ad - Prevents equipment corrosion, plaster damage. Ideal total alkalinity range 80 - 120ppm. Raises Total Alkalinity. Prevents eye irritation.
BrandPool Mate #ad
ManufacturerRobelle Industries #ad
Height10 Inches
Length9.25 Inches
Weight25 Pounds
Width9.25 Inches
Part Number1-2257

10. Robelle


8-Pounds, Robelle 2808B Calcium Hardness for Swimming Pools

Robelle #ad - Prevents the staining or etching of your pool's surface. Ideal calcium hardness range 200 - 400ppm. Increases Water Hardness. Low calcium hardness level can cause corrosive water.
BrandRobelle #ad
ManufacturerRobelle #ad
Height10 Inches
Length10 Inches
Weight8 Pounds
Width10 Inches
Part Number2808B