Water balance has five factors:
pH, Total Alkalinity “TA”, Calcium Hardness “CH”,
Temperature, and Total Dissolved Solids “TDS”. For our
purpose, it is assumed that the temperature will stay between
35 C and 40 C, and the TDS level will remain below 1500 parts
per million (ppm), providing the drain and refill schedule is
followed.
Water balance affects the safety of your equipment as well as
the appearance of the water. pH is most critical, but the TA and
CH levels must also be considered.
Maintain pH between 7.4 and 7.8.
Spa Life pH Up raises pH; Spa Life pH Down lowers pH. See the
above table.
NOTE: Dosages will vary depending on TA and CH levels. The recommended
dosages are approximate and presume the water is balanced to 100
ppm TA and 250 ppm CH. All dosages per 2000 litres (Tbsp. = level
tablespoon).
Total Alkalinity buffers or controls changes in pH. Maintain TA between 100-150 ppm. Total Alkalinity is critical to the protection of the equipment. Spa Life Buffer, in four level tablespoon doses, will raise the TA 20 ppm in 2400 litres of water.
Calcium Hardness controls overall buffering capacity of the water. Low CH can lead to corrosion; high CH to scaling, cloudy water and staining. Maintain CH between 150-300 ppm. 10 level tablespoons of Spa Life Cal will raise CH 50 ppm in 2000 litres of water. To lower CH, drain part of the old water, refill with fresh tap water, then retest.
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