Model # P32036DE

Product Description

pH Decreaser  

Pool Solutions PH Minus is used to lower pH levels in swimming pool water preventing eye irritation, cloudy water, and scaling. The most important step in pool maintenance is keeping the pool water balanced. 
  • Compares To BioGuard Lo n Slo
  • Sodium Bisulfate
  • Recommended pH levels are between 7.2 and 7.8
  • Complete instructions for dosage on container
Amount of pH Decreaser (Dry Acid) needed to lower Alkalinity
                                                                    Pool volume in gallons
Desired Decrease 1,000 5,000 10,000 15,000 20,000 25,000 50,000
10 ppm 0.21 lbs. 1.06 lbs. 2.13 lbs. 3.19 lbs. 4.25 lbs. 5.31 lbs. 10.63 lbs.
20 ppm 0.43 lbs. 2.13 lbs. 4.25 lbs. 6.38 lbs. 8.50 lbs. 10.63 lbs. 21.25 lbs.
30 ppm 0.64 lbs. 3.19 lbs. 6.38 lbs. 9.56 lbs. 12.75 lbs. 15.94 lbs. 31.88 lbs.
40 ppm 0.85 lbs. 4.25 lbs. 8.50 lbs. 12.75 lbs. 17.00 lbs. 21.25 lbs. 42.50 lbs.
50 ppm 1.06 lbs. 5.31 lbs. 10.63 lbs. 15.94 lbs. 21.25 lbs. 26.56 lbs. 53.13 lbs.
Amount of pH Decreaser (Dry Acid) needed to decrease pH

Current pH level
                  Pool volume in gallons
10,000 15,000 30,000 60,000 120,000  
7.6-7.8 15 oz. 1.4 lbs. 2.8 lbs. 5.6 lbs. 11.2 lbs.  
7.8-8.0 1.2 lbs. 1.9 lbs. 3.7 lbs. 7.5 lbs. 15 lbs.  
8.0-8.4 1.9 lbs. 2.8 lbs. 5.6 lbs. 11.2 lbs. 22.5 lbs.  
Over 8.4 2.5 lbs. 3.7 lbs. 7.5 lbs. 15 lbs. 30 lbs.  

*Caution: Do not add more than 20 oz. per 10,000 gallons of water at one time. If the pool needs more than this, add the 20 oz. then retest 4-6 hours later. After testing, you can make the necessary adjustments
For More Pool Chemicals

Product Specifications

36 lbs.

?     Asked on 7/26/2021by Gerald Sherman


A  Answered on 7/27/2021 by InyoPools Product Specialist Stephen B.

Thank you for contacting Inyo Pools, Sorry but the biggest we carry is 36 pounds.

?     Asked on 8/1/2018by Inyo Visitor

What is the ingredient breakdown of this product?

A  Answered on 8/1/2018 by InyoPools Product Specialist Lennox H.

Hi. This product consists of Sodium Bisulfate 95% (active) and Adjuvants 5% (inactive). 

?     Asked on 10/18/2012by Guest

My alkalinity is 240 ppm and my pH is a 6.8. I've added a decent amount of acid to get to this point and obviously need to do some more adjusting. Is there anything else I can use aside from the acid?

A  Answered on 10/18/2012 by InyoPools Product Specialist Patrick P.

At this point, I would recommend partially draining the pool and refilling with fresh water. The amount of acid you will need to add (depending on pool size) will bottom out the pH making the water very acidic. Partially draining and refilling will probably be a little quicker considering the fact that tap water is usually pH neutral.

?     Asked on 10/18/2012by Guest

My pool water is very cloudy and has algae in it so we super shocked it. Now the chlorine and pH are really high. I want to put a pH decreaser in it but we are having people over? Is it safe to swim or do we have to wait?

A  Answered on 10/18/2012 by InyoPools Product Specialist Patrick P.

If the pH and chlorine are high, I would not recommend anyone swimming in the pool. The quickest way to lower both chemicals without adding more chemicals (More chemicals may add to the cloudiness) is to partially drain and refill the pool. You will want to keep everyone out of the pool until the levels are back within range.


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