Thank you for this write up; it really helped. I will use this as a guide to set up my system. I bought the semi-automatic co2 system from DrFoster and Smith. It came with the Azoo regulator, bubble counter, ceramic diffuser, timer, and bubble counter. Hopefully I will be happy with the performance for my 46g bow front. Do you think the ceramic diffuser will be good enough for a 46g or should I just purchase a reactor?