Keeping the total alkalinity balanced helps maintain proper pH, prevents damage to equipment, especially the heater, keeps the water clear, and prevents scale build-up. In spas, the alkalinity should be maintained from approximately 125 to 150 ppm. Levels above this will not necessarily cause problems, but other factors should be taken into account, such as the Calcium Hardness, average temperature, and pH. Perform a complete spa water analysis and follow ALEX instructions for TA adjustment. Total alkalinity is lowered by the use of Brominating Tablets and regular use of either Spa Lite or Brominating Concentrate, so it is important to test it periodically and adjust as needed. Test total alkalinity at least once every three to four weeks, depending on the amount of use the spa is getting.
In spas using Perfect Balance, the total alkalinity still must be maintained. If the total alkalinity becomes too low, it can shorten the life of the Perfect Balance and the pH may fluctuate more frequently. For spas using Brominating Tablets with Perfect Balance, apply a weekly maintenance dose of 30 mL of the latter per 1,000 litres.
If the total alkalinity is high, use SpaGuard Lo’N’Slo (and not liquid acid) to gradually lower it over a period of days. Make sure aeration is off when you are adding Lo’N’Slo.
If the total alkalinity is low, use SpaGuard Balance Pak 100 according to label instructions or ALEX recommendations.