[erikages]

There are lots of writings on this, yes! Opinions differ, but there's a general consensus that if you're going to employ ozone, it's best to have the ozonated air go directly into the aerated updraft of your skim. My own skimmer (Aqua C EV-120) came equipped with an ozone input, and many do provide this as an option.

The other direction is to employ a separate ozone reactor in your system and leave your skimmer alone.

In either case, you will require a filter for the skimmer or reactor air output, as you don't want un-carbon-scrubbed ozone going into your house! Too, ozone can influence the nastiness of the smell of your skimmer (this hasn't happened to mine), and your home can end of smelling like something died. Thus the use of a carbon filter for outoing air.

Hope this helps. You'll find that there's a huge amount of differing opinion on where and how to employ ozone in your system, but the two alternatives above are the two most common solutions.