Ozone is a natural component of our atmosphere.
In aquariums, it is used to oxidize organic compounds. Ozone is most commonly introduced via a venturi protein skimmer. You should purchase an ozonizer that can deliver 2mg per gallon of tank water. If you do plan to use an ozonizer in conjunction with your skimmer, be sure that your skimmer is ozone resistant. Also, you must use neoprene tubing to deliver the ozone mixture to the skimmer.