The Pool Clinic’s Water Testing And Analysis

 

Your pool water should be tested two to three times a week (pH / chlorine). Keeping track of your water balance will create an optimum swim environment for you and your guests and ensure a long life for your pool.

The most important factor to your water balance is the pH. The pH sets the tone for your water and keeps it clear and inviting.

Water Balance is the correct ration of mineral content and pH level, which prevents the pool water from being corrosive or scale forming. The Elements of Water Balance must fall within a specific range to ensure proper water balance. After testing, simple raise or lower the elements to the proper range to balance the water. The Pool Clinics services  provides cleaning and preventative maintenance using  “Palintester” water analysis equipment, making sure that your water is balanced correctly.

The Following are tested regularly

pH is the value that determines how acidic  or basic solution is.  Th pH is important because when pH is the right range it provides comfort to the swimmer, when it is not I will do the opposite. (Red eyes etc) pH also improves the killing power of sanitizer.

Think about this: ph of our skin blood and eyes is 7.4—7.6 and the  pH of lemon juice is  4.0 which is very low

LOW pH will cause:

  • Etched plaster
  • Corroded metals
  • Stained plaster
  • Eye and skin irritation
  • Lower of Total Alkalinity
  • Increased chlorine usage
  • Stretching vinyl liners
  • Blistering of fiberglass

HIGH pH will cause:

  • Scale formation
  • Cloudy water
  • Short filter runs
  • Eye & skin irritation
  • Poor chlorine efficiency

Ideal range:  7.4—7.6

Test Chlorine

Test your chlorine levels 2 to 3 times per week or daily on hot days, using test kits or test strips to ensure that your chlorine level is maintained on an ideal lever and/ or your salt Chlorinator is generating enough to sanitize your pool

Ideal level  2—4 ppm

  • Minimum level 1.5 ppm
  • Maximum level 10.0 ppm (shocking the pool)

Salt chlorinators generates hypochlorite or chlorine gas and when added to the water, it forms hypochlorous acid (HOCl), which acts as a disinfectant (kills bacteria, algae etc) as well as oxidizer  (removes organic and inorganic impurities—chloramines) you will need to super chlorinate at least once per month.

The Following are tested once per month

Calcium Hardness

Calcium Hardness is the measure of calcium in the water.  Water must have a certain amount of calcium in it for it to be “balance with the other elements”.  The goal is neutral or inert water. Without calcium this cannot be accomplished.

LOW Calcium will  cause:

  • Difficult balancing water
  • Etching of plaster
  • Corrosion of metal components
  • Eye and skin irritation
  • Water foaming

HIGH Calcium will cause:

  • Scale Formation on pool surface and equipment
  • Cloudy water
  • Eye & skin irritation
  • Difficulty balancing water
  • Chemicals become less effective

Ideal range:  200—400 ppm (mg/l)

Total Dissolve Solids (TDS)
TDS is the sum of all materials in the water.  It increases whenever water evaporates out of pool.  In essence distilled water leaves the pool and all of the solids stay behind.

Total Dissolved Solids (TDS)
Ideal:  1000—1,500 ppm after Salt Level

Salinity Level (Total Dissolve Salt in water)
4000—6000 ppm (depending on the minimum amount of your chlorinator)

HIGH TDS / Salinity will cause:

  • Salty Tasting water
  • Colored but clear water
  • Algae
  • Corrosion of metal parts
  • False readings
  • Cloudy water
  • Eye and skin irritation

Ideal range:  200—400 ppm (mg/l)

Total Alaklinity (TA)

Total Alkalinity (TA) acts to stabilize pH and to maintain  the proper pH levels.  One cannot be adjusted without affecting the other.

LOW Total Alkalinity

  • Etched plaster
  • Corroded metals
  • Stained plaster
  • Eye and skin irritation
  • pH bounce (high or low)

HIGH Total Alkalinity will cause:

  • Scale formation
  • Cloudy water (usually due to high pH)
  • Difficulty changing or maintaining pH
  • Eye & skin irritation

Ideal range:  80—120 ppm

Water Balance (should be checked once per month)

Pool Water balancing is not such a complicated exercise. It is simply the relationship between different chemical measurements in your pool water. Your pool water is constantly changing, year round. Everything from weather to oils, dirt, and cosmetics affect your pool water balance – in short, anything that comes in contact with your pool water.

You will probably not change the water in your pool for many years. Continuous filtration and disinfection removes contaminants which keep the water enjoyable but this does not balance your water.  A pool that is “balanced” has proper levels of pH, Total Alkalinity, and Calcium Hardness.

When water is considerably less than saturated it is said to be in a corrosive or aggressive condition.  When water is over saturated and can no longer hold the minerals in solution it is in a scaling condition.  So then, balanced water is that which is neither over or under-saturated.

The cliché that “water seeks its own level” certainly applies here. Water which is under-saturated will attempt to saturate itself by dissolving everything in contact with it in order to build up its content.  Water which is over-saturated will attempt to throw off some of its content by precipitating minerals out of solution in the form of scale.  How do we know when our water is over or under saturated?  We use a Palintester, a recognized system for water analysis,  to measure the chemical levels of pH, alkalinity, and calcium hardness.

The Pool Clinic Offers Water Sample Analysis to calculate your “Water Balance” Simple bring in a sample in our nearest Office and will check them for you.

Index Water Balance condition Recommendation
Below 9.6 Highly Corrosive
  • Increase pH to 7.5 -7.8
  • Increase Calcium Hardness to at least 50 mg/l
  • Increase Total Alkalinity to 100 mg/l or higher as necessary
  • Retest Water Balance
9.6 to 10.5 Corrosive
  • Increase pH to 7.5 -7.8
  • Increase Calcium Hardness to at least 50 mg/l
  • Increase Total Alkalinity to 100 mg/l or higher as necessary
  • Retest Water Balance
10.6 to 10.9 Acceptable Balance
  • Retest Water Regularly
11 to 11.2 Ideal Balance
  • No Action Required
11.7 to 12.6 Scale Forming
  • Decrease pH to 7.2 – 7.5
  • Decrease Total Alkalinity to 150mg/l or lower as necessary
  • Retest Water Balance
Above 12.6 Highly Scale Forming
  • Decrease pH to 7.2 – 7.5
  • Decrease Total Alkalinity to 150mg/l or lower as necessary
  • Retest Water Balance

 

 

 

 

 

 


This entry was posted in Uncategorized. Bookmark the permalink.