Installation manual

20
SOME TIPS ON WATER CHEMISTRY
Some Tips On
Water Chemistry
How to adjust pH.
A pH range of 7.2 - 7.6 is ideal for maximum comfort and minimum chlorine demand. Always
adjust total alkalinity before adjusting pH.
Low pH (acidic water) leads to stinging eyes and corrosion of open metal fittings. Raise the pH
by adding sodium bicarbonate or soda ash. Consult your pool professional regarding which
chemical is best for your situation and the proper amount to use. Check the pH after 4 hours
of circulation, adjusting as necessary to achieve the proper range.
High pH (alkaline water) leads to clouding of the water and reduces the amount of active
chlorine.This means algae and germs can grow. Lower the pH by adding muriatic acid to the pool
water.The acid demand indicated by your 4-in-1 test kit will show the amount of acid to use.
If your pH remains inconsistent, check your total alkalinity.
Total alkalinity affects pH.
To tal alkalinity is a measure of the alkaline chemicals in your pool water (eg. Bicarbonates,
carbonates, and hydroxides). It can be thought of as the buffering system necessary to control
pH. Low alkalinity can be compared to weak shock absorbers on a car, allowing pH to
fluctuate.The pH will be difficult to maintain and staining of pool surfaces may occur when
total alkalinity is too low.
Total alkalinity should be in the range of 80 - 120 ppm.Total alkalinity is often confused with
pH, which it affects.
To raise total alkalinity, add pH buffer (sodium bicarbonate) at the rate shown in the
manufacturers instructions to achieve a reading in the 80 - 120ppm range. 1.5 lbs. of sodium
bicarbonate raises 10,000 gallons of pool water by 10 ppm.
To lower the total alkalinity, use muriatic acid.The acid demand chart in your 4-in-1 test kit will
indicate the necessary amount to add.Adjust as needed until the reading (taken at least 24
hours later) is in the 80-120 ppm range.When total alkalinity is correct, you may need to
adjust pH.