Best filter media choice?
I have a Fluval 304 canister filter that I am trying to pick the optimal media setup for its 3 trays. The trays are divided in 2, so really there are 6 places to put stuff. Everything first goes through a foam block, then the three trays. Anyway, I've heard carbon is unnecessary and I don't need a pH raising or lowering agent. No ammonia problem either. So, in that case I figured I would set it up this way:
Tray #1: Fluval Pre Filter Media
Consists of insert ceramic rings used to trap large particles before they clog the finer sieves of the modules above. The media forces water into many complex paths as it moves through this layer, further increasing its mechanical and biological activity and filtering area. An additional benefit, is it supports large populations of bacteria for proper biological action on ammonia and nitrite. This reduces the need for frequent changes of the active filter media. Pre-filter is permanent, and requires only occasional rinsing.
Tray #2 & #3: Fluval Bio-Max Rings
Suitable for both fresh and marine aquariums. When used in the middle filter module, fluval biomax is the ideal host material for large populations of beneficial bacteria. The ring size and shape provide an excellent strainer for large particulate wastes when used in the first (lowest) media module. There is still powerful biological activity when employed in the lower chamber.
Sound good? It seems kind of like a plain setup, but really all I want is good biological filtration. Any suggestions?