You will to get a Ozonier, ORP controller, Air Pump, Carbon and Skimmer that is safe with Ozone...
You will need to connect up the ORP controller to the Ozonier so that your controller will off the Ozonier once your ORP reach the amount that you wan it to be at...
Air Pump to "pump" the ozone from the Ozonier...
Carbon is to be placed at the outlet of your skimmer, so that it will absorb away they extra amount of ozone that will go into your main tank...
Skimmer must be safe with Ozone too... Ozone will corrode plastic if i am not wrong...
My basic knowledge of use of Ozone...