A2Z Ozone SP - Series - Manual (Page 15)

• Reduce constant purchasing of harmful chemicals
• Eliminate red, irritated eyes and dry, itchy skin
• Eliminate costly replacement of faded swimwear
• Remove unpleasant chlorine / chloramine odors
• No adverse health or environmental effects
• Improvement of the filter and coagulant capacities = reduction of coagulant use & less
water backwashing
• Water consumption can be decreased, because of an increase in water quality
8) Can I stop using Bromine?
You will definitely reduce your chemical usage in your pool up to 95% depending on weather
conditions and pool characteristics. Ozone provides better water quality and oxidizes many
contaminants that bromine cannot. However, Ozone only lasts in pool water for a short period
of time (15-30 minutes) therefore in order to provide lasting protection during times when
ozone is not being injected, to control algae and to oxidize ammonia and swimmer waste, you
must maintain a small residual of bromine (1.0 to 2.0 ppm of bromine) in the water. The longer
the ozone system operates the less bromine you will have to use to maintain water quality.
Ozone will kill algae at the point of injection, not algae that are growing on the pool walls.
Recommended Dosage for Sodium Bromide is 20g per 1000 Liters of water every 6 months.
9) How does ozone get into the water?
Ozone is a gas and it is only slightly soluble in water. It must be thoroughly dissolved in water so
that the chemical reactions with contaminants can take place. The most common way in
swimming pools is with a venturi injector, which is a device a 100mm in length with each end
the same diameter (40/50mm) as the pool plumbing line. A section of pool piping is removed,
and a venturi injector is installed. The injector’s diameter is smaller in the middle, similar to
squeezing or pinching a hose. The water travelling into the injector begins to move faster. In the
middle of the injector there is a small hole. As water is pumped through the plumbing and past
the hole, a vacuum is created. The amount of vacuum is dependent on the amount of water
flow through the injector – more water equals more vacuum. If a small flexible hose or tube is
attached to this small hole, a liquid or gas can be drawn into the injector and mixed into the
water. The goal is to make the smallest bubbles possible and to keep the bubbles in contact with
the water for as long as possible. The ozone that does not get dissolved will kill or oxidize
anything in the water.
10) How long will ozone last in my pool?
For the purification of water and air, it’s needed to produce ozone on-site. Because of its short
half-life, ozone will decay soon when produced. The half-life of ozone in water is about 30
minutes, which means that every half hour the ozone concentration will be reduced to half its
initial concentration. For example, when you have 8 g/l, the concentration reduces every 30
minutes as follows: 8; 4; 2; 1; etc. In practice the half-life is shorter because a lot of factors can
influence the half-life. Factors are temperature, pH, concentration and sort solutes. Because
ozone reacts with all kinds of components, the concentration of ozone will reduce quickly. When
most of the components are oxidized, the residual ozone will remain, and the concentration of
ozone will reduce.
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