Running ozone actually decreases the amount that your skimmer pulls by breaking down the molecules before they are skimmed out. Ozone is a highly reactive and deadly gas so it would be a good idea to do a lot of reading on it before you try it out. For those reasons an ORP Controller is a must. Here are some links to get you started:
Ozone and the Reef Aquarium, Part 1: Chemistry and Biochemistry
http://reefkeeping.com/issues/2006-03/rhf/index.php
Ozone and the Reef Aquarium, Part 2: Equipment and Safety
http://reefkeeping.com/issues/2006-04/rhf/index.php
Ozone and the Reef Aquarium, Part 3: Changes in a Reef Aquarium upon Initiating Ozone
http://reefkeeping.com/issues/2006-05/rhf/index.php