The air pump pushes air past the combination lamp which produces about 0.6 grams of ozone per hour. The ozone loaded air is mixed with water in the static mixer where the oxidation process takes place. The water mixed with ozone is then pumped through the combination lamp again but now on the outside of the quartz glass. The water is exposed to UV-C radiation so that nearly all algae, bacteria and viruses are killed. The UV-C radiation will also break down any residual ozone changing it into OH- (Hydroxyl radicals) which have a very high oxidation potential for extra clarity of your water.