Water Testing; Total Alkalinity; Ph Control - Dimension One Spas Aquatic Fitness System Owner's Manual

WATER TESTING:

We recommend testing Aquatic Fitness System water twice a week with Dimension One Spas -- Spa
Test Strips. These are available from an authorized Dimension One Spas Dealer.
Adjust total alkalinity first, when TA is in the proper range, adjust the PH, then check and adjust
the sanitizer level.

TOTAL ALKALINITY:

Total Alkalinity is a measurement of the water's ability to resist changes in pH. TA (Total Alkalinity) affects
and buffers the pH of the water. With TA above 120 ppm, pH becomes difficult to adjust. With TA below 80
ppm, pH becomes unstable and is more difficult to keep in the ideal range. Proper TA levels also allow other
chemicals to perform optimally.
Follow directions in the Start-Up procedures section for adding Decreaser and Increaser.

pH CONTROL:

All bodies of water have pH (potential Hydrogen), which is a measurement of the Hydrogen ion concentration
in the water. A pH reading of 7.0 is considered neutral, a lower reading is considered "acidic" and a higher
reading is considered "basic". The proper pH for spa water is between 7.2 – 7.8. High pH (above 7.8) can
reduce sanitizer efficiency, cloud the water, promote scale formation on surfaces and equipment, and interfere
with filter operations. When pH is too high, add Dimension One Spas -- pH/Alkalinity Decreaser. Low
pH (below 7.2) is equally damaging and can cause equipment corrosion, water that is irritating, and rapid
sanitizer dissipation. When pH is too low, add Dimension One Spas -- pH/Alkalinity Increaser.
Follow directions in the Start-Up procedures section for adding Decreaser and Increaser.
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Aquatic Fitness System
2002 Owner's Manual