I've been thinking about ozone for a while now, so I'm also going to be tagging along on this ride...
I didn't have the money for the whole ozone setup, so for right now, I purchased an ORP monitor (NOT a controller) and let the probe settle for 48 hours per instructions... It settled at 240 *OUCH!*
So I went out and purchased a bottle of Kent PolyOx (potasium perm.) and dosed it per instructions. My ORP has gone up to 382 and it stays about there until feeding time...
Anyway, it was a heck of a lot cheaper to go this route than the whole ozone setup, and my water is really looking clear now.
I'm going to keep going this way for a while longer, I'm about 4/5's thru that first bottle of PolyOx now... Heck if my results hold, a $9 bottle of PolyOx ever couple months is still cheaper than $400-600 for the whole ozone setup, not to mention the $$$ for upkeep of the ozone (air driers) and the carbon required to pass all the water comming out of your skimmer or reactor thru it....