I am currently in the works of setting up a 30 gallon tropheus tank, but the only problem that I am running into is what size filter should I use. I am thinking that I am gonna go with the Fluval canister filter but not sure of what size. I am torn between the Fluval 304 and 305 for the simple fact that I am not sure if you can control the flow of water be shot back into your aquarium. One other thing that I am curious about, do the Fluval canister filters come with UV sterilizers? Thanks in advance
