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  • Product Name: ozone for swimming pool water treatment
  • Product Number: QJ-8004Y

Ozone for swimming pool application

Ozone was first used as a water sanitizer in France in the early

1900s. It is the most popular method of treating drinking and pool

water throughout Europe.Ozone is one of the strongest oxidizers

available for treating swimming and spa water and is growing in

popularity in the U.S.A. It kills bacteria and oxidizes organic

compounds including chloramines, soaps, oils and bather wastes and

does not alter the water's pH. Due to limitations of the amount of

ozone that can be economically introduced to pool and spa water,

algae growth is not eliminated and may possibly increase.Two systems

have been developed for the production of ozone for pool and spa

water.The most common European method - and the most expensive - is

the Corona Discharge. This method generates ozone by exposing

pressurized, dried air to highvoltage electricity. The ozone gas is

then directed into the bottom of the pool and seen as very small

bubbles rising to the surface. The ozone can be introduced into a

separate chamber or directly to the pool.The Ultraviolet (LTV) or

photochemical method of ozone production passes the pressurized,

dried air next to a UV bulb within a chamber, where the UV rays

bombard the oxygen molecules and produce ozone. A single LTV lamp is

capable of treating approximately 10,000 gallons of water. The UV

method is more common for spas or private small pools and is less

expensive to operate. The LTV method cannot match the output of the

Corona Discharge method.

Once it has done its job as an oxidize r, ozone reverts to oxygen and

improves both smell and taste of the water. This factor is worth

noting, especially for indoor pools.Ozone has to be continually

generated, because its effectiveness is about 22 minutes while the

gas remains in the water. Ozone offers no continuous residual, and

because it is not effective against algae growth, most manufacturers

recommend that ozone be introduced with a halogen such as chlorine or


Testing of ozone residual is in parts per billion (ppb). Test kits

are available that use DPD as the reagent and color calibrations that

indicate readings from 0 to 100 ppb.Testing with the use of an

Oxidation Reduction Potential (ORP) meter is effective, and a minimum

level of 650 millivolts is recommended. Because ozone of the smallest

residual is effective and adequate for treating water, when combined

with chlorine or bromine, a test reading of either is an indication

of the effectiveness of the ozone.