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Pool Basics 2804PB Calcium Hardness Increaser for Pools, 4-Pound

4.5 out of 5 stars 21 customer reviews

Price: $23.54 & FREE Shipping on orders over $49. Details
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Ships from and sold by Amazon.com. Gift-wrap available.
4-Pounds
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  • A low calcium hardness level can cause corrosive water
  • Protects plumbing and heater
  • Prevents the staining or etching of your pool's surface
$23.54 & FREE Shipping on orders over $49. Details In Stock. Ships from and sold by Amazon.com. Gift-wrap available.

Frequently Bought Together

  • Pool Basics 2804PB Calcium Hardness Increaser for Pools, 4-Pound
  • +
  • Pool Mate 1-2256B Total Alkalinity Increaser for Swimming Pools, 10-Pound
Total price: $46.46
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Technical Details


Product Description

Size: 4-Pounds

Pool Basics Calcium Hardness is used to raise calcium hardness levels when measures drop below the recommended range of 200-400 ppm. If calcium hardness levels are too low the "soft water" will corrode pool equipment, etch pool plaster and may cause metallic stains. To raise the hardness level by approximately 50ppm is necessary to add 6.25 lbs. per 10,000 gallons of pool water.

Product Information

Size:4-Pounds
Product Dimensions 5.1 x 5.1 x 10.5 inches
Item Weight 4.2 pounds
Shipping Weight 4.2 pounds (View shipping rates and policies)
Manufacturer Robelle Industries
ASIN B00BOLHQ9C
Item model number 2804PB
Customer Reviews
4.5 out of 5 stars 21 customer reviews

4.5 out of 5 stars
Best Sellers Rank #43,044 in Patio, Lawn & Garden (See Top 100 in Patio, Lawn & Garden)
#56 in Patio, Lawn & Garden > Pools, Hot Tubs & Supplies > Cleaning Tools & Chemicals > Chemicals & Water Testing Products > Pool Balancers

Warranty & Support

Manufacturer’s warranty can be requested from customer service. Click here to make a request to customer service.

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Customer Reviews

Top Customer Reviews

Size: 4-Pounds Verified Purchase
Use it to maintain spa. Only used it once so far so a little goes a long way. Packages well and I a tablespoon at a time and then test after one cycle of the spa. Test strips so far have shown product is still working.
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Size: 8-Pounds Verified Purchase
does the job at a great price . . .less expensive than pool supply houses. Note - this works for both the swimming pool and hot tubs. You can buy a smaller container of this labeled for hot tubs at three times the price, but you're just throwing your money away.
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Size: 4-Pounds Verified Purchase
This product raised the hardness in my near 500 gallon spa without using much product. It is a great price as well.
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Size: 25-Pounds Verified Purchase
As advertised.
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By Mike Roe on November 24, 2014
Size: 25-Pounds Verified Purchase
wonderful!
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Size: 8-Pounds Verified Purchase
Just what we needed!
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Size: 25-Pounds Verified Purchase
works as described, dissolves quick. Good and cheap product.
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Size: 25-Pounds Verified Purchase
Just what I needed for the pool to get rid of the chalkiness
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