Good news! I just broke the clip that connects the hose to the body on my Fluval 405.
Apart from the element of flow, which I have adressed with a powerhead, and a place for the bacteria to colonize, which I imagine is apparent in my dirt substrate - is there any need for a canister filter?
This is a co2 injected tank, should it make any difference.
"Good judgement comes from experience, and much of that comes from bad judgement"
I don't see the need for a canister on a planted tank, although most of mine have them. Unless you have a crazy amount of fish in the tank, there really shouldn't be a need for additional bio than what the plants/substrate are providing.
I should think you might see increase in particulate matter,suspended matter, plant matter, that ordnarily would be trapped in/on mechanical media in filter.
This I think would largely depend on number of fishes,food's offered,plant health,tank maint.