Calcium Hardness Increaser 25 Lb. Bucket - P37025DE



Model # P37025DE

  4.8 Average  



Model # P37025DE

Product Description

Calcium Increaser  
Pool Solutions Calcium Plus increases water hardness when necessary to prevent pool water from becoming corrosive to the plumbing and pool surface. Proper calcium levels are vital to keeping a pool maintained and balanced.
  • Compares to BioGuard Balance Pak 300
  • Calcium chloride
  • Recommended calcium hardness levels between 150 ppm and 250ppm
  • Complete instructions for dosage on container
Desired Increase                             Amount needed to increase Calcium Hardness                                                                  
                                                   Pool volume in gallons
  1,000 5,000 10,000 15,000 20,000 25,000 50,000
10 ppm 2 oz. 10 oz. 1 1/4 lbs. 1 3/4 lbs. 2 1/2 lbs. 3 1/4 lbs. 6 1/4 lbs.
20 ppm 4 oz. 1 1/4 lbs. 2 1/2 lbs. 3 3/4 lbs. 5 lbs. 6 1/4 lbs. 12 1/2 lbs.
30 ppm 6 oz. 1 3/4 lbs. 3 3/4 lbs. 5 1/2 lbs. 7 1/2 lbs. 9 1/2 lbs. 18 3/4 lbs.
40 ppm 8 oz. 2 1/2 lbs. 5 lbs. 7 1/2 lbs. 10 lbs. 12 1/2 lbs. 25 lbs.
50 ppm 10 oz. 3 lbs. 6 1/4 lbs. 9 1/2 lbs. 12 1/2 lbs. 15 3/4 lbs. 31 1/4 lbs.

*Caution: Do not add more than 10 lbs. per 10,000 gallons of water at one time. If the pool needs more than this, add the 10 lbs./10,000 gallons amount then retest 12 hours later. After testing, you can make the necessary adjustments.

For More Pool Chemicals

Product Specifications

25 lbs.

?     Asked on 9/2/2014 by Guest

How do I add the Calcium Hardness to my pool?

A     Answered on 9/2/2014 by InyoPools Product Specialist Patrick P.

When adding our product P37025DE be sure to dissolve it in a bucket of water first before adding it to the pool. Be sure not to add any other chemicals for the time being and add no more than 10lbs per 10,000 gallons of pool water aswell. Follow the instructions if unsure about it.  Be advised this chemical does heat up when mixing with water.

?     Asked on 12/20/2012 by Guest

What level should the calcium in my swimming pool be?

A     Answered on 12/20/2012 by InyoPools Product Specialist Patrick P.

The calcium level in a swimming pool should be 200-400 parts per million.

?     Asked on 12/19/2012 by Guest

I just had my swimming pool water tested and I was told that my calcium level is really high. What chemical would I use to lower it?

A     Answered on 12/19/2012 by InyoPools Product Specialist Patrick P.

If the calcium level is too high, the only way to lower it would be to partially drain and refill the swimming pool.


Est. Repair Time

Less than 1 hr

Tools Needed

An empty bucket to mix with water and pour around the pool.

I couldn't seem to add enough chlorone and the PH was way too high.

Written on 11/7/2017 by Guest

I had no idea what balancing pool water was about until I went to pool school. According to the table I needed to add 25 lbs. I started slowly adding and ended up using all 25 and all the values came into range. No miracle just a great product.

Were these instructions helpful? 


Est. Repair Time

Less than 1 hr

Tools Needed


Low calciun hardness was etching the pool's plaster

Written on 6/5/2017 by lesis

Got the best price from Inyo pools; added 2 buckets (50) lbs (the recommended amount on side of bucket) to pool water; after 48 hours, pool water tested 350 ppm calcium hardness.

Were these instructions helpful? 


Review Summary

  (Average 4.8 out of 5 stars)
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