1.13 Arctic Spas Onzen Maintenance Schedule
The following table outlines the typical water maintenance program required for an Arctic Spa
tted with Onzen. To help ensure chemicals 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.
Item Frequency Maintenance Task Target Range
TA Weekly
Check the Total Alkalinity to ensure it
is in the target range.
80 – 100 ppm.
pH Weekly
Check the Potential Hydrogen to en-
sure it is in the target range.
7.2 – 7.6 ppm
FCL
Weekly (& before
eachuse)
Check the Free Chlorine Level to en-
sure it is in the target range.
Adjust the chlorine levels using “Boost”
granular chlorine, after heavy use or if
the Onzen Output is too low
1 – 3 ppm
CH Monthly
Check Calcium Hardness level to en-
sure it is in the target range. Salt sys-
tems perform best with Low Calcium
Hardness levels.
50-150 ppm
Sodium
Chloride
Monthly
Check the Sodium Chloride Level to
ensure it is in the target range.
Version 8 2000-2500
ppm
Onzen
Output
As required
If spa use changes signicantly, adjust
the output level of Onzen Chlorine
Production ( “On” )
2 - 4 Hours per day
suggested
Filter Every 3 Months Change the lter N/A
Water Every 6 Months Change the water N/A
Note: It is also good practice to take a water sample on a regular basis and have the water independently
tested by your local spa/pool store.
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Understanding Onzen™
Owners Manual - Onzen™