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Tips for keeping your pool water sparkling clear

Testing your pool 2-3 times a week is important to maintain adequate water balance and sanitizer levels plus to insure swimmer comfort. Although drop-type tests are best, test strips are a quick (30 second) means to test the pool for adequate sanitizer levels as well as pH and total alkalinity. Proper testing also ensures that calcium levels are maintained and that there are no metals present in the pool water. You can buy test kits at your local pool store, or take a sample of the pool water to them for testing. Many pool stores will do this for free. Below is an example table of the recommended levels to look for when testing.

Always adjust the chemicals in your swimming pool according to the alphabet. Adjust the alkalinity first, then the bromine or chlorine, then the pH.


Ideal Range

How to Lower Level

How to Raise Level

Free Chlorine residential 1.0 to 3.0 ppm Neutralizer Shock Treatment/Chlorine
Free Chlorine commercial 2.0 to 5.0 ppm Neutralizer Shock Treatment/Chlorine
Total Chlorine 0 ppm Shock Treatment not applicable
Total Bromine residential 2.0 t0 5.0 ppm Neutralizer Shock Treatment/Bromine
Total Bromine commercial 3.0 to 6.0 ppm Neutralizer Shock Treatment/Bromine
Total Alkalinity for vinyl pools 80 to 150 ppm Controller 2000 Total Control 1000
Total Alkalinity for gunite pools 100 to 150 ppm Controller 2000 Total Control 1000
Calcium Hardness for vinyl 200 to 400 ppm Calcium Reducer Calcium Lift 3000
Calcium Hardness for gunite 250 to 400 ppm Calcium Reducer Calcium Lift 3000
pH 7.2 to 7.6 ppm Controller 2000 Builder 2000
Cyanuric Acid 40 to 100 ppm fresh water Sun Shield 4000
Copper in a chlorine pool 0 ppm Metal Muscle not applicable
Copper in an AlgaeShield pool up to .9 ppm don't add anymore Algae Shield
Copper in a Pristine Blue pool up to .9 ppm don't add anymore Pristine Blue
Iron 0 ppm Super Erace not applicable
Manganese 0 ppm Super Erace not applicable
Borate 30 to 50 ppm don't add anymore Proteam Supreme
Salt 3000 to 4000 ppm fresh water Pool Salt
Total Dissolved Solids under 3000 ppm fresh water not applicable
Nitrates under 20 ppm fresh water/heavy shock not applicable
Phosphates up to 125 ppb Phosphate Remover not applicable

The pH level in your pool should be about the same as the pH level of human tears, 7.2, though in the range of 7.2 - 7.6 is optimal. Chlorine is about 10 times more effective at sanitizing your water when the pH is at 7.2 rather than at a high ph level of say 8.2. pH can best be measured with a drop-type test kit versus a test strip, which can be easily misread.

Most often you'll find the pH level is high; the best way to lower pH is by slowly pouring "Muriatic Acid" (AKA Hydrochloric acid) directly into the pool while the pool pump is on and the water is circulating. However, granular acid (pH Minus or Decreaser) is safer to use alternative than Muriatic Acid. If pH is high, add a small amount of Muriatic Acid and retest the water after about 6 hours of continuous filtration, readjusting pH as needed. This will prevent "bouncing". If you have a true pH bounce problem, that is typically due to a LOW Total Alkalinity issue; once properly adjusted, the pH should maintain itself well over a period of 1 to 3 weeks depending on rain, use, etc.

If swimmers are having a problem with "burning eyes,” high or low pH is probably to blame, not high chlorine.

Shock the pool weekly. As it works to clean your pool, chlorine binds to other chemicals like ammonia and nitrogen, which not only render it effectively inactive, but also create an irritant that can cause skin conditions.

Follow up the next morning with a maintenance dose of algaecide. Algaecides are surfactants that work on pool surfaces to prevent algae from growing.