I run one Aquaclear 110 on 55 gal with only mechanical media(foam).
Also run aquaclear 70 powerhead, with quick filter in this tank for more circulation that pleco's I keep, enjoy.
As mentioned,,Bacteria which processes waste, is foumd on all hard surfaces in the tank as it matures.
Is no benefit from providing excess biological media, surface area, for the bacteria only develop's in proportion to the food(fish load) available.
Though I run only foam in this filter as well as canister's,, anything in the flow of water will harbor the beneficial bacteria needed.(lava rock,pot scrubbies,tinker toy's,foam)
I run two Eheim 2217's on planted 80 gal and the circulation in my tank(s) is used to distribute heat,nutrient's,and allow particulate matter to be kept in water column longer for mechanical media(foam) to catch = cleaner ,crisper ,water.
The finer the filter material ,the cleaner the tank will look and faster the fine material will become dirty.(gotta clean it )
Keep the filter maintained,water changes regularly,,and fishes will be happy,healthy.