Just a quick update, I honestly have not noticed too much of a difference in running the sterilizer than without it... other than I have to wipe my glass one or two days later than I normally would.
When I added the emperor angelfish, it came into the system perfectly healthy and not a spot of ich on it. About 3-5 days in my system and you could see some white spots on its fins and tail but nowhere on the body. My midas blenny got a few spots on the right side of its body as well. Then 5-7 days later, nothing on any fish. Is this because of the UV sterilizer? I believe so... I think it helped it from spreading. Do I think the sterilizer eradicated ich from my system? No. It did what I hoped it would do, minimize an epidemic in my tank.
Perhaps if I plumbed it the way it was recommended, with the intake at the bottom of the tank and the return at the top, perhaps it could eradicate it but I don't really want more plumbing lines in my tank. Supression works for me!