INTRODUCTION
IMPORTANT : SEE CHEMICAL SAFETY & WARRANTY SECTION.
PLEASE TAKE THE TIME TO READ THESE INSTRUCTIONS CAREFULLY AND NOTE HOW
THEY APPLY TO YOUR PARTICULAR POOL AND EQUIPMENT.
When Chlorine is the primary sanitiser in a
swimming pool application, an ORP level of around
650 mV is adequate to maintain a good level of
sanitising power all year round.
Please note that when running Chlorine at under
1.0 ppM, we highly recommend that an Eco-
Oxidizer is also installed. The Eco-Oxidizer will
prevent accumulation of combined chlorine (such
as chloramines), which are cause red eyes, itchy
skin and that “chlorine smell”. The Eco-Oxidizer will
oxidize combined chlorine back to free chlorine
continuously, whenever the pool filtration pump is
running.
ORP is not specifically a measurement of the ppM
of Chlorine, so there is no conversion from one to
the other. In many ways, ORP is a much easier way
to maintain a pool than attempting to maintain a
specific ppM of Chlorine. For example, a heated
pool with high bather load would need around
4ppM of Chlorine to maintain a chemical activity of
650 mV ORP. A pool that is not being used during
winter with low water temperature may need
1ppM of Chlorine to maintain the same level of
650mV of ORP.
WHAT IS “ORP” ?
“ORP” stands for “Oxidation Reduction Potential”.
It is also often referred to as “Redox”. In simple
terms, ORP is a measurement of chemical activity
in a body of water. The unit of measurement is
millivolts (”mV”).
When Chlorine is used as a backup sanitiser, for
example when a Bionizer is installed, an ORP level
of around 550 mV will help to maintain a crystal
clear pool, but with a lower Chlorine level.
When using the OxiBOSS, the only requirement for
testing chlorine is a regular test with a chlorine test
kit. The frequency of this should be once per week
in a commercial pool with heavy bather load, down
to once per month for a domestic swimming pool
with a small bather load.
So an ORP system can be used with the SAME set
point all year round, and will simply add the correct
amount of Chlorine to maintain a suitable level of
sanitising effectiveness. EASY ! The graph below
illustrates this point.
3
INTRODUCTION
SUMMER
AUTUMN
WINTER
SPRING
Required Chlorine, ppM
Required ORP, mV
