As I understand it the probe should take about a week to 'break in'... though I only lasted a few days waiting and started the O3 injection at very low levels.

Actually have the controller set to cut off at 350 and ORP fluctuates between 360-380 during the photoperiod, within an hours of the lights going down ORP rises to 390ish and holds. I'd say she's in maintance mode now... The ozone generator runs for a few minutes maybe a dozen times a day or less, and only hear it once or twice at night.

I removed the carbon bags from the skimmer outputs and just have them running passively in the sump. The carbon was getting beat up by the water and smashed to bits small enough to escape the bags and entering the water column. No bag on top of the skimmer, but the horriffic skimmate odor around the cabinet is gone and nobody's dead yet so I'm assuming O3 levels entering the air are safe enough.... YMMV!!!

The biggest key I've found to maintaining higher ORP levels is pH! Slowly raising pH from 8.1-8.2 up to 8.3-8.4 made a huge difference. Makes sense, as the ORP is directly proportional to pH.

Observed effects;
- Water clarity is fantastic
- skimmate production is actually down in quanity but what it's pulling out is dark brown (compared to medium to dark green before the ozone).
- Good response from coral, better polyp extension (too soon for growth observations)

Conclusions;
- should have tried this a lot sooner
- need a couple more O3 setups :D