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WATER QUALITY AND MAINTENANCE
Once the CH is balanced, it normally remains stable, although the addition of more water with a high
or low calcium content will raise or lower the CH reading of the water.
When the Calcium Hardness is within the recommended range, proceed.
Balancing The pH
The recommended pH level for your spa water is 7.4-7.6.
The pH level is the measure of acidity and alkalinity. Values above 7 are alkaline; those below 7 are
acidic.
Maintaining the proper pH level is extremely important:
Optimizing the effectiveness of the sanitizer.
Maintaining water that is comfortable for the user.
Preventing equipment deterioration.
If the spa water’s pH level is too low, the following may result:
The sanitizer will dissipate rapidly.
The water may become irritating to spa users.
The spa’s equipment may corrode.
If the pH level is too low, it can be increased by adding pH/Alkalinity Up (sodium hydrogen carbon-
ate) to the spa water.
If the pH level is too high, the following may result:
The sanitizer is less effective.
Scale will form on the spa shell surface and the equipment.
The water may become cloudy.
The filter cartridge pores may become obstructed.
If the pH is too high, it can be decreased by adding pH/Alkalinity Down (Sodium bisulfate) to the spa
water.
NOTE: After adding pH/Alkalinity Up (sodium hydrogen carbonate) or pH/Alkalinity Down (sodium
bisulfate), wait at least two hours before testing the water for pH. Measurements taken too soon
may not be accurate.
It is important to check the pH on a regular basis. The pH will be affected by the bather load, the
addition of new water, the addition of various chemicals, and the type of sanitizer used.
When the pH is within the recommended range, proceed.
Maintaining Sanitizer Level
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