1.11.3 Establishing Correct Water Chemistry
The following steps provide guidance to help establish correct chemically balanced water.
To help ensure chemicals dissolve appropriately it is good practice to first mix/dissolve the chemical in an
uncontaminated container of hot water before carefully adding to the spa water.
Steps to Establish Chemically Balanced Water With Onzen Continued
Step 4. Add Salt to Spa Water & Test TA / pH
(a) Slowly pour the dissolved salt from the pail into the spa water. (b)
Run pumps for 5 minutes to help mix salt blend through.
(c) Wait 1 hour.
(d) Then test and adjust Total Alkalinity level accordingly.
(e) Then test and adjust pH level accordingly.
Refer to steps 3 and 4 for correct TA/pH levels.
Step 5. Repeat Step 3 & 4
Repeat steps 5 and 6, ensuring all sub steps are carried out
accordingly.
Step 6. Repeat Step 3 & 4
Repeat steps 5 and 6, ensuring all sub steps are carried out
accordingly.
Step 7. Test Sodium Chloride Level
You will now need to test sodium chloride levels.
Refer ‘Using Sodium Chloride Test Strips’ for details.
If sodium chloride levels are low, dissolve 1/2 lb (225 Grams) of salt
(using cup provided) into hot water. Pour the dissolved salt into the
spa water. Test sodium chloride level.
Repeat until required sodium chloride level is reached:
Minimum
Maximum
2000 ppm
2500 ppm
Note: The Arctic Spas Onzen Salt Chart in this guide provides the
estimated impact of adding 1⁄2 lb (225 Grams) of salt to your spa.
Note: For start up it is recommended to strive for the minimum salt
dosage. Once a Sodium Chloride reading has been taken and the
minimum salt dosage achieved, it can be increased slightly to ac-
commodate spa usage and bather load, if increasing the Onzen run
time does not adequately increase the Chlorine Residual. Having the
minimum amount of salt concentration unless the Onzen system is
unable to maintain the proper Chlorine Residual, will reduce poten-
tial corrosion and increase the life of the Onzen Output Electrode.
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