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Calcium hardness level prevents foaming, equipment and surface erosion and scaling. See package for instructions. 20, 000 gallons: 6. 25 lbs to increase hardness 50ppm, 50 Lbs/200ppm.

10, 000 gallons: 3 lbs to increase hardness 50ppm, 25 Lbs/200ppm. 20, 000 gallons: 6. 25 lbs to increase hardness 50ppm, 3 Lbs/100ppm, 50 Lbs/200ppm. Raises calcium in swimming pool water.


Accurate & reliabledouble-needle detection Technology strongly enhances the speed and accuracy of detecting and analyzing soil moisture, pH and light. Perfect gardening hand toolsthis ph meter can be used both indoors and outdoors, you can test at any time any place as you want, find out what your plants need with a little help from our soil pH test.
Easy to usethis plant water meter works by sensing the moisture and chemical ions of the soil, just plug the probes into the soil about 2-4 inches, no need to be charged either, no battery need, then you will easily read the value showed by the pointer at a quick time.

Spread the product over the surface of the water while the pump is running. Dosage - the ideal range is 200 to 400 parts per million ppm. Six lbs. Trust rx clear as the most reliable leader in pool cleaner products and supplies. Per 10, 000 gallons will raise the hardness level approximately 50 ppm.
Also prevents etching, and fiberglass pools. Prevents corrosion - rx clear calcium plus helps stop corrosion of metal surfaces such as light fixtures, railings, plaster, ladders, gunite, pitting, and delamination of concrete, pool cover components, screws, pool heater components, shotcrete, and metals in your pump or filter. Water chemistry - one of the most important aspects of proper swimming pool care involves the maintenance of balanced water chemistry. Raising calcium hardness helps prevent corrosion of metal and plaster surfaces.


1. In The Swim
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In The Swim Calcium Hardness Increaser 45 lbs Y7220
#adIn The Swim #ad - Average 97% Calcium Chloride. Prevents aggressive or corrosive water. Increases calcium hardness level. Dosage 6 lbs per 10, 000 gallons to raise calcium hardness level about 50 ppm. Do not pre mix.More information #ad
Brand | In The Swim #ad |
Manufacturer | In The Swim #ad |
Height | 18.6 Inches |
Length | 12.5 Inches |
Weight | 48 Pounds |
Width | 10.3 Inches |
Part Number | Y7220 |
Model | Y7220 |
More information #ad
2. Clorox
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White, Clorox Pool&Spa 12204CLX Calcium Hardness Increaser, 4 lb
#adClorox #ad - Ideal for plaster pools and soft water areas. Power source Type: Manual. Prevents corrosion, etching, and staining. Prevents pool surface damage. Increases low Total Hardness levels in swimming pool water. For best results, use with the Clorox Pool app.More information #ad
Brand | Clorox #ad |
Manufacturer | Clorox® Pool&Spa™ #ad |
Height | 11.5 Inches |
Length | 4.4 Inches |
Weight | 4 Pounds |
Width | 10 Inches |
Part Number | 12204CLX |
Model | 12204CLX |
More information #ad
3. Puri Tech
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Puri Tech Pool Chemicals Calcium Hardness Increaser Plus for Pools & Spas Increases Calcium Hardness Levels 5lb
#adPuri Tech #ad - 5, 6. 25 lbs/100ppm, 25 lbs/100ppm, 3 lbs/100ppm, 000 Gallons: 1.5 lbs to increase hardness 50ppm, 12. 5 lbs/200ppm. Raises calcium in swimming pool water.Calcium hardness level prevents foaming, equipment and surface erosion and scaling. See package for instructions. 20, 000 gallons: 6. 25 lbs to increase hardness 50ppm, 50 Lbs/200ppm.
More information #ad
Dosage: 2, 000 gallons: 3 lbs to increase hardness 50ppm, 000 gallons: 105 lbs to increase hardness 50ppm, 12. 5 lbs/100ppm, 6. 25 lbs/200ppm. 10, 25 lbs/200ppm. Brand new packaging: all puri Tech Chemicals now come in resealable bags for easy storage! Active ingredients: Calcium Chloride.Brand | Puri Tech #ad |
Manufacturer | Puri Tech #ad |
Height | 6 Inches |
Length | 12 Inches |
Width | 6 Inches |
Part Number | PCC |
Model | PCC |
More information #ad
4. Puri Tech
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Puri Tech Pool Chemicals 25 lb Calcium Hardness Increaser Plus for Swimming Pools & Spas Increases Calcium Hardness Levels Prevents Staining on Surfaces
#adPuri Tech #ad - See package for instructions. Brand new packaging: all puri Tech Chemicals now come in resealable bags for easy storage! Active ingredients: Calcium Chloride.10, 000 gallons: 3 lbs to increase hardness 50ppm, 25 Lbs/200ppm. 20, 000 gallons: 6. 25 lbs to increase hardness 50ppm, 3 Lbs/100ppm, 50 Lbs/200ppm. Raises calcium in swimming pool water.
More information #ad
Calcium hardness level prevents foaming, equipment and surface erosion and scaling. 5, 25 lbs/100ppm, 6. 25 lbs/100ppm, 12. 5 lbs/100ppm, 12. 5 lbs/200ppm. Dosage: 2, 000 gallons: 105 lbs to increase hardness 50ppm, 000 gallons: 1. 5 lbs to increase hardness 50ppm, 6. 25 lbs/200ppm.Brand | Puri Tech #ad |
Manufacturer | Puri Tech #ad |
Part Number | PCC |
Model | PCC |
More information #ad
5. LEISURE POOL & SPA SUPPLY INC. LP
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Leisure Pool 25 lb. Calcium Hardness Increaser Calcium Chloride
#adLEISURE POOL & SPA SUPPLY INC. LP #ad - Ships in a 25 lb. 25 lb. Pail of calcium chloride dry granules commonly known as Calcium Hardness Increaser, will raise calcium hardness levels in commercial and residential swimming pools and spas.More information #ad
Per 10, 000 gallons will raise CH levels by 10 ppm. 83-87% pure calcium chloride, meets atsM 098 AASHTO M144 Standards. Pail with resealable lid for easy storage. Other uses: ice melt, dust control, concrete acceLERATOR. Dosing instructions: 1. 1 lb.Brand | LEISURE POOL & SPA SUPPLY INC. LP #ad |
Manufacturer | Leisure Pool & Spa Supply, Inc. #ad |
Height | 14 Inches |
Length | 12 Inches |
Weight | 25 Pounds |
Width | 12 Inches |
Model | C23444-PL25 |
More information #ad
6. Aoboco
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Aoboco Splash Calcium Hardness Increaser Calcium Chloride Flake 77% 8 lbs
#adAoboco #ad - Kindly notethis ph meter soil can not be applied to test ph value of any other liquid. If the soil is too dry the indicator will not move, and water it before testing. After using the plant moisture meter, please wipe the probe clean, do not affect the accuracy of the next use.Accurate & reliabledouble-needle detection Technology strongly enhances the speed and accuracy of detecting and analyzing soil moisture, pH and light. Perfect gardening hand toolsthis ph meter can be used both indoors and outdoors, you can test at any time any place as you want, find out what your plants need with a little help from our soil pH test.
More information #ad
3-in-1 functionthis specially designed soil moisture meter can test moisture, pH value and sunlight level of plants, quickly helps you to know the soil condition and do adjustment for better plants care. Easy to usethis plant water meter works by sensing the moisture and chemical ions of the soil, just plug the probes into the soil about 2-4 inches, no need to be charged either, no battery need, then you will easily read the value showed by the pointer at a quick time.
Brand | Aoboco #ad |
Weight | 2 Pounds |
Part Number | 1 |
Model | MK178 |
More information #ad
7. Rx Clear
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Rx Clear Calcium Plus | Granular Calcium Chloride | Raises Calcium in Swimming Pool Water | Hardness Increaser for Swimming Pools | Prevents Corrosion | 25 Lbs
#adRx Clear #ad - Calcium plus - use rx clear swimming pool calcium booster when the calcium hardness reading in your pool drops below 150ppm. Also helps prevent foaming of certain chemicals. 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. Dosage - the ideal range is 200 to 400 parts per million ppm. Six lbs. Trust rx clear as the most reliable leader in pool cleaner products and supplies. Per 10, 000 gallons will raise the hardness level approximately 50 ppm.
More information #ad
Do not pre dissolve this product. Add when water hardness levels drop below 150 ppm. When swimming pool chemicals are not at their ideal levels, swimmers can be at risk of contracting illnesses and suffering from skin irritation, and pool or spa equipment, hoses, the water can turn dull and cloudy, and surfaces can become damaged. Also prevents etching, and fiberglass pools. Prevents corrosion - rx clear calcium plus helps stop corrosion of metal surfaces such as light fixtures, railings, plaster, ladders, gunite, pitting, and delamination of concrete, pool cover components, screws, pool heater components, shotcrete, and metals in your pump or filter. Water chemistry - one of the most important aspects of proper swimming pool care involves the maintenance of balanced water chemistry. Raising calcium hardness helps prevent corrosion of metal and plaster surfaces.
Brand | Rx Clear #ad |
Manufacturer | Rx Clear #ad |
More information #ad
8. Pool Mate
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Pool Mate 1-2825 Calcium Increaser for Swimming Pools, 25-Pound
#adPool Mate #ad - Low calcium hardness level can cause corrosive water. Increases Water Hardness. Prevents the staining or etching of your pool's surface. Ideal calcium hardness range 200 - 400ppm.More information #ad
Brand | Pool Mate #ad |
Manufacturer | Robelle Industries #ad |
Height | 11 Inches |
Length | 10.25 Inches |
Weight | 25 Pounds |
Width | 10.25 Inches |
Part Number | 1-2825 |
Model | 1-2825 |
More information #ad
9. Quality Producer Direct
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Quality Producer Direct Calcium Hardness Increaser 1 Gallon Calcium Chloride Powder for Pools & Hot Tubs
#adQuality Producer Direct #ad - Lab-tested & Certified. Great value: 1 gallon of Calcium Chloride Powder. Calcium chloride anhydrous Powder Increases Total Hardness of Pool Water. Used to prevent Corrosion in Pools & Hot Tubs. Manufactured in the USA.More information #ad
Brand | Quality Producer Direct #ad |
Manufacturer | Quality Producer Direct #ad |
Height | 7.5 Inches |
Length | 7.47 Inches |
Width | 7.47 Inches |
More information #ad