yep i run carbon 24 / 7 and rowaphos like reef said the water becomes crystal clear. I lisened to randy homes farley talk about ozone on podcast and he was saying when run in a skimmer the contact time is to short to kill all bacteria but it will clear the water , So im thinking of running a small pump on my old berlin skimmer maybe a slow loop? , Uv also clears the water to right? alot of the top tanks seem to run them both. I find myself wanting cleaner and cleaner water