1.10.3 Establishing Correct Water Chemistry
The following steps provide guidance to help establish correct chemically balanced water. To help ensure chemi-
cals dissolve appropriately it is good practice to rst 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
Step 1. Test and Adjust Calcium / Total Alkalinity
(a) Test Calcium hardness. Level should be between
50-150 ppm.
If high, lower with a stain & scale controller such as
Arctic Pure, Best Defence, to help hold the Calcium in
suspension.
NOTE: Salt systems perform best with Low Calcium
levels.
(b) Test Total Alkalinity. It should be 80 – 100 ppm
(100 max). If high, lower Total Alkalinity with Arctic Pure,
Adjust Down (pH Down) or muriatic acid. Do not raise
Total Alkalinity!
WARNING: Skipping these steps on Start-up can cause
scaling problems and cloudy water that may not be
covered under warranty.
NOTE: Use all products according to directions on the
bottle.
Step 2. Test and Adjust pH
Test pH. Levels should be between 7.2 – 7.6.
If pH is high, (over 7.6) add Arctic Pure, Adjust Down. If
pH is low, (under 7.2) add Arctic Pure, Adjust Up.
NOTE: Use all products according to directions on the
bottle.
NOTE: Salt systems naturally drive pH levels to increase,
strive to achieve a Balanced pH level.
NOTE: High pH will cause calcium to precipitate (fall out
of suspension). The problem with calcium falling out of
suspension is that it collects on the heater and pump,
and shortens their life.
Step 3. Mix Salt Crystals
Dissolve 1/3 of the minimum recommended salt dosage
in a 5 Gallon (20
litre) pail of hot water.
Refer Arctic Spas – Onzen Salt Dosage Chart contained
in this guide.
105105
Understanding Onzen™
Owners Manual - Onzen™
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