Pool Water Total Alkalinity (TA)
Total Alkalinity (TA) – To maintain proper pH of the pool water the Total Alkalinity must be in the correct range, the Total Alkalinity acts as a buffer or stabilizer for the pH preventing it from being volatile. If your Total Alkalinity is not correct, you will have a very difficult time getting the pH correct.
The normal range for Total Alkalinity in a swimming pool is between 80 and 120 Parts Per Million (PPM). The effects of improper Total Alkalinity levels is similar to improper pH levels.
Some problems with Total Alkalinity below 80 ppm include:
- Plaster pool walls deteriorate, become etched and the surface dissolves
- Irritation of eyes & skin
- pH levels erratic
- Metal pump and heater parts corrode
To raise the Total Alkalinity, typically bicarbonate of soda (baking soda) or soda ash to the water. Be sure to follow the manufacturers dosing instructions.
Some problems with Total Alkalinity above 120 ppm include:
- pH levels hard to adjust
- Chlorine becomes ineffective
- Cloudy water
To lower the Total Alkalinity, typically muriatic acid or sodium bisulfate is added to the water. Be sure to follow the manufacturers dosing instructions.
This information was provided by Southwest Premier Home Inspection, the Phoenix, AZ Home Inspection Leader. Visit our website at www.swpHomeInspect.com or call us at 623-203-0106 to schedule your Phoenix Home Inspection.
