TERM DEFINITION
Chlorine
Free Chlorine (FCL)
FCL is the active form of chlorine that actually kills bacteria and algae (It is a Sanitizer).
Sanitizer is extremely important for killing algae, bacteria and viruses, and preventing
unwanted organisms for growing in the spa. At the same time, you don’t want too high a
sanitizer level, or it can irritate your skin, lungs and eyes.
Always maintain the sanitizer level in your spa within the recommended range.
Also refer ORP
Chlorine Residual The actual level of chlorine in the water after the chlorine demand has been satisfied.
Sanitizer Chemical used to kill bacteria.
Generic names: Chlorine, Bromine and Biguanide.
Arctic Pure, Boost
Adding Arctic Pure BOOST should be avoided unless the ORP level is very low.
Also Refer Section 1.16 Caring for your Onzen System, Question 3 If the Onzen
System is not working, what should I do if I need to add Arctic Pure BOOST or other
sanitizer to the spas water?
Note; resetting the spas breaker could speed up sensor recovery.
Parts Per Million (ppm) ppm: parts per million, a standard measure of chemical or mineral concentration.
Organic waste Debris such as microorganisms, perspiration, urine, etc. which needs to be burned up or
“oxidized” regularly to prevent haze, algae, chloramines, etc.
Shock An oxidizer that “burns off” the organic wastes which cause cloudiness and algae. It is a
generic term for a chemical used to oxidize organic wastes. Arctic Pure, Boost.
Warning Adding a Chlorine agent such as Boost to the spas water should be avioded as this
will poison the Onzen Sensor Probe which will cause inacurate ORP and pH readings to be
sent to My Arctic Spa and registered with My Arctic Spa. If chlorine is added to the spas
water it will take at least three days for the Onzen Sensor Probe to clense itself and start
sending accurate readings to My Arctic Spa.
Also Refer Section 1.16 Caring for your Onzen System, Question 3 If the Onzen System is
not working, what should I do if I need to add Arctic Pure BOOST or other sanitizer to the
spas water?
Note; resetting the spas breaker could speed up sensor recovery.
ORP Oxidation–Reduction Potential.
This is simply a measurement of the water’s ability to cleanse itself. ORP is measured in
millivolts (mV). Also refer FCL
Onzen Owners Manual
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