The guy at our LFS here is saying Ozone reactors are the Sh*t. I am not sure if I believe it, I havne't heard of too many guys in CA that run them, whats your take on Ozone Reactors?
I really like the one I put on my Jacuzzi. Really cuts down on the need for Bromine.
So I can attest to ozone generators in general being good at sterilizing.
No personal experience on ozone in aquarium though, so best to point you to a good article here: ozone usage link
Then the personal question is : Is that what you want.
Like UV, they kill everything, even the many beneficial critters.
My personal opinion : UV, Ozone, and mechanical filters are probably good for FOWLR,
but for a reef setup, a more natural balanced approach might be better.