Best Calcium Hardness Increaser for Swimming Pools in 2025
Updated on July 2025
#1
Recommended
6% Off
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- Raises calcium levels in pools to prevent surface erosion and damage.
- Excessive calcium increaser use may cause scaling and equipment blockage.
- Proper calcium hardness enhances overall pool water quality.
- Ideal calcium range is 180-220 ppm; levels should not exceed 400 ppm.
- Add 6 pounds per 10,000 gallons to increase hardness by 50 ppm if levels fall below 150 ppm.
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- Raises calcium levels in pools to prevent surface erosion and damage.
- Excessive calcium increaser use may cause scaling and equipment blockage.
- Proper calcium hardness enhances overall pool water quality.
- Ideal calcium range is 180-220 ppm; levels should not exceed 400 ppm.
- Add 6 pounds per 10,000 gallons to increase hardness by 50 ppm if levels fall below 150 ppm.
#2
Value for Money
Pool Mate 25-Pounds Premium Calcium Hardness Increaser for Pools, 100% Calcium Chloride, Made in USA
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- Calcium chloride effectively raises pool hardness
- Prevents corrosion and etching in pool surfaces
- Recommended calcium hardness level: 200 - 400 ppm
- 8 ounces increases calcium hardness by 10 ppm per 5,000 gallons
- Maintains pool surface integrity by preventing stains and etching
- Low calcium hardness may lead to water quality problems
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- Calcium chloride effectively raises pool hardness
- Prevents corrosion and etching in pool surfaces
- Recommended calcium hardness level: 200 - 400 ppm
- 8 ounces increases calcium hardness by 10 ppm per 5,000 gallons
- Maintains pool surface integrity by preventing stains and etching
- Low calcium hardness may lead to water quality problems
#3
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- Calcium chloride suitable for pool treatment
- Quickly enhances overall water hardness
- Prevents pool corrosion and surface etching
- Recommended calcium hardness between 200 - 400 ppm
- 8 ounces increases hardness by 10 ppm per 5,000 gallons
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- Calcium chloride suitable for pool treatment
- Quickly enhances overall water hardness
- Prevents pool corrosion and surface etching
- Recommended calcium hardness between 200 - 400 ppm
- 8 ounces increases hardness by 10 ppm per 5,000 gallons
#4
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- Calcium chloride specifically formulated for pool use
- Quickly boosts total hardness of pool water
- Reduces risk of corrosion and surface etching
- Recommended calcium hardness range is 200 - 400 ppm
- 8 ounces increases calcium hardness by 10 ppm per 5,000 gallons
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- Calcium chloride specifically formulated for pool use
- Quickly boosts total hardness of pool water
- Reduces risk of corrosion and surface etching
- Recommended calcium hardness range is 200 - 400 ppm
- 8 ounces increases calcium hardness by 10 ppm per 5,000 gallons
#5
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- Increases calcium hardness to protect pool surfaces and equipment
- Compatible with all types of swimming pools
- Prevents water corrosion by raising calcium levels
- Protects pool liners and equipment from damage
- Use HTH 6-Way Test Strips weekly to maintain calcium levels between 200 and 500 ppm
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- Increases calcium hardness to protect pool surfaces and equipment
- Compatible with all types of swimming pools
- Prevents water corrosion by raising calcium levels
- Protects pool liners and equipment from damage
- Use HTH 6-Way Test Strips weekly to maintain calcium levels between 200 and 500 ppm
#6
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- Calcium chloride chemical for pool maintenance
- Quickly boosts total water hardness
- Prevents corrosion and etching in pools
- Recommended calcium hardness level: 200 - 400 ppm
- 8 ounces increases calcium hardness by 10 ppm for 5,000 gallons
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- Calcium chloride chemical for pool maintenance
- Quickly boosts total water hardness
- Prevents corrosion and etching in pools
- Recommended calcium hardness level: 200 - 400 ppm
- 8 ounces increases calcium hardness by 10 ppm for 5,000 gallons
#7
8% Off
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- Raises calcium hardness levels in swimming pools for optimal water balance.
- Fast-dissolving calcium chloride flakes, compatible with chlorine and saltwater pools.
- Simply add to pool water during circulation; safe to swim in 15 minutes.
- Suitable for both inground and above-ground pools, trusted by pool owners.
- Manufactured in the USA with high quality standards for reliable results.
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- Raises calcium hardness levels in swimming pools for optimal water balance.
- Fast-dissolving calcium chloride flakes, compatible with chlorine and saltwater pools.
- Simply add to pool water during circulation; safe to swim in 15 minutes.
- Suitable for both inground and above-ground pools, trusted by pool owners.
- Manufactured in the USA with high quality standards for reliable results.
#8
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- Prevents equipment corrosion from low calcium hardness
- Protects plaster from etching caused by low calcium hardness
- Increases calcium hardness levels
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- Prevents equipment corrosion from low calcium hardness
- Protects plaster from etching caused by low calcium hardness
- Increases calcium hardness levels
#9
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- Maintains balanced pH levels to reduce maintenance frequency in pool water.
- Enhances swimmer comfort by preventing eye and skin irritation from unbalanced pH.
- Prevents corrosion of pool equipment by keeping pH levels stable.
- Suitable for all types of pools, including new, refilled, saltwater, and those using liquid chlorine.
- Includes the Clorox Pool App for on-the-go testing and personalized product recommendations.
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- Maintains balanced pH levels to reduce maintenance frequency in pool water.
- Enhances swimmer comfort by preventing eye and skin irritation from unbalanced pH.
- Prevents corrosion of pool equipment by keeping pH levels stable.
- Suitable for all types of pools, including new, refilled, saltwater, and those using liquid chlorine.
- Includes the Clorox Pool App for on-the-go testing and personalized product recommendations.
#10
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- Increases calcium hardness levels in swimming pools instantly
- Enhances the effectiveness of other pool chemicals with proper calcium hardness
- Balanced calcium levels help reduce equipment corrosion and staining
- Composed of 100% granular calcium chloride
- Available in a ready-to-use 5-lb pouch or a 25-lb bucket
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- Increases calcium hardness levels in swimming pools instantly
- Enhances the effectiveness of other pool chemicals with proper calcium hardness
- Balanced calcium levels help reduce equipment corrosion and staining
- Composed of 100% granular calcium chloride
- Available in a ready-to-use 5-lb pouch or a 25-lb bucket
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