How to Adjust the PH & Chlorine in a Spa
- 1). Test the pH and chlorine levels in your spa using a water testing kit. The easiest type of kit to use is the testing strip that has clearly labeled swatches to test things such as pH levels, chlorine levels, alkalinity and nitrates. Dip the strip into the water and then hold it up to the chart to compare the strip swatch colors to those of the chart.
- 2). Lower the pH levels of your spa water if the pH level is above 8.5. To lower pH levels, you have to raise the acidity of the water. Using bromine instead of chlorine in your spa helps lower pH levels because of the acidity of the chemical.
- 3). Raise pH levels of your spa water if the pH level is below 6.5. Adding sodium bicarbonate to your water will help raise the pH levels.
- 4). Add chlorine to your spa water if the chlorine levels are below 2 ppm (parts per million).
- 5). Drain water from your spa and add fresh water if the chlorine levels are at 10 ppm or above to lower the chlorine levels. How much water you drain depends on how high the chlorine levels are, but draining half the spa and having to add chlorine later is better than not draining enough.
- 6). Run your spa for six hours after you make any changes to the water chemistry and then re-test the water. Adjust the chlorine and pH accordingly and repeat this step until your pH and chlorine levels are within the desired parameters.
