Onzen Questions
Question 1: How do I know if the Onzen system is working?
Conduct a “Sanitizer Production test” (Also known as a Smoke test).
This procedure activates the Onzen System while de-activating the filtration pump so you can see the mist of
gas bubbles produced by the Onzen System.
Question 2: What should I do if it fails the “Sanitizer Production test”?
First, confirm you have the correct concentration of salt in the water “using sodium chloride test strips”. Then,
start maintaining your water manually using “Boost” granular chlorine to sanitize and Adjust Up/Adjust
Down to balance pH. Continue to do this daily until the system is repaired by an authorized service techni-
cian.
* Keep enjoying your hot tub!
Question 3: What should I do if the chlorine levels are too high?
Turn the Onzen Output down (decrease “On” settings).
Unless you added granular chlorine or shock to the water high chlorine levels mean the system is staying
on too long for your circumstances. It may take a day or two for levels to normalize, or you can speed this
process up by using a chlorine neutralizer, such as “X-it”.
Question 4: What should I do if the pH keeps increasing?
Confirm that your Total Alkalinity is at the recommended level and reduce it manually with ‘Adjust Down’.
This is normal; all spa salt systems cause pH to increase.
Question 5: Will the salted water damage my lawn?
This is very unlikely.
The recommended concentration of salt is used is approximately 10% of the concentration of sea water.
Question 6: Why is my water bright yellow, or bright green, or a rusty colour suddenly?
This can happen if the pH gets too high.
Lower the pH using ‘Adjust Down’. High pH is a sign that the Onzen Output may be turned up too high, so
you may need to adjust the Onzen Output After balancing the pH and adjusting the Onzen Output wait
about 48 hours. If the colour of the water does not normalize you may need to replace the water.
* Keep an eye on the pH and adjust it weekly to avoid this problem in the future.
Question 7: What is the typical amount of maintenance I need to do with Onzen?
1. Change the water twice a year.
2. Change the filter 4 times a year.
3. Check the Total Alkalinity weekly to make sure it is in the target range (Under 100).
4. Adjust the pH once a week. Salt systems naturally drive pH levels to increase, strive to achieve a Low pH
level 7.2
must not exceed 7.6.
5. Check Calcium level monthly to ensure it is in the target range. Salt systems perform best with Low Cal
-
cium levels;
strive for a target range between 50 - 150 ppm.
6. Adjust the Onzen Output “On” if hot tub use changes significantly.
7. Adjust the chlorine levels using “Boost” granular chlorine, after heavy use or if the Onzen Output is too
low. Refer: Onzen Maintenance Schedule for further details.
1.13 Onzen Frequently Asked Questions
Onzen Owners Manual
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