Pool Water Chemistry Chart

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Balancing Pool Water Chemicals

It is easier and less expensive to maintain clear pool water than to rectify a problem. Maintaining the correct chemical balance is important in keeping operation costs low. A properly balanced pool "uses" less chemicals.

 

The life of your Pool Plaster can also be affected if the amount and balance of chemicals are incorrect. See also Pool Plaster....

 

For example, having too little stabilizer in the water, allows the sun to destroy the chlorine in the water. Alternative, using too much stabilizer, will prevent the Chlorine from sanitizing the water. I.E. Doing it's work. Think of stabilizer as "sun block" for chlorine.

 

Following is a table showing the suggested numbers for some of the tests.

 

Water Chemistry Reference Chart

 

Chemical

MIN

IDEAL

MAX

Chlorine
Cyanuric Acid
pH
Alkalinity
Hardness
Iron/Copper
1.0 ppm
20 ppm
7.2
70 ppm
150 ppm
0 ppm
2 .0 ppm
30 - 80 ppm
7.4 - 7.6
80 - 140 ppm
200 - 450 ppm
0 ppm
3.0 ppm
100 ppm
7.8
150 ppm
500 ppm
0.1 ppm

 

Pool water testing tips

 

Understanding and maintaining the pH and Alkalinity by self-testing the water is not complicated.

 

Use the test kit provided by Alfresco Pools to test the sanitizer (chlorine) and pH (Muriatic or hydrochloric) Acid levels of your pool water at least once a week. You can also take a sample of your pool water to a pool supply company once a month, and they will typically test the pool water sample for free, provide you with a report of the pool water test, and recommend the chemicals needed.

 

  • Purchase new test strips or liquid test kits at the beginning of each pool season to ensure accuracy.
  • Adjust all chemical levels as necessary to maintain proper balance.
  • Follow all chemical safety precautions and handling tips on the manufacturer’s label.

 

"Black Algae"

 

Black algae is one of the most difficult Algae to control and eliminate. It appears a black discoloration or a tar-like deposit. It is difficult to remove because the outer layer is polymucosaccharide, which acts as a water repellent barrier and shield the underlying algae from contact with the chemically-treated water.

In addition to shock treatment, application of a polymer algaecide is recommended, The pH should be lowered to around 7.2, and pool jets directed towards the affected areas. Also, by adding a quart algaecide, it acts as a wetting agent that will help the chemicals penetrate through the polymucosaccharide barrier.

 

Too much chemicals

 

Other than costing you unnecessary money, too much chemicals can damage your equipment. Although the piping is corrosive resistant, the Power Element in the heater might need replacing more often. This gets corroded quicker with high amounts of chlorine, or high amounts of metal in the water.

 

Discoloration or staining of plaster

 

Over dosage on chemicals tends too hasten the process of discoloration of plaster over time. This can be slowed down by maintaining the correct Ph balance of the pool water.

Updated: 24 Oct 2022

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