On my 50 gallons tank I have 36W JEBAO UV sterilizer connected to the inlet of my Fluval 304 and I am feeding the UV sterilizer with 2 bubbles per second of CO2 with the airline tube through the inlet all the way to the sterilizer body. I did not have to drill any holes in UV and it does not have any problems dissolving 2 bubbles per second, it does not accumulate any gas so there is zero noise coming out of it. At more bubbles per second or if my flow slows down it is possible that some gas will collect and produce gurgling noise. I think 36W UV can handle the full flow of Fluval so no need to slow it down. I just started doing this but I don't expect any problems with it. The main problem in dissolving CO2 in sterilizer is that water comes in from the side and not from the top so bubbles have tendency to accumulate and produce noise so bubble rate can't be to high for this to work.