Undergravel or canister filters will provide sufficient filtration. The force of outflow from an outside power filter or powerhead in most situations would be too strong. Since this setup calls for slow moving water, the choices of aquatic plants will be much more extensive than for the other habitat designs. The one limiting factor might be their over wintering tolerance. At room temperature, cabomba, myriophyllum, anacharis, dwarf water lilies, cardamine, and many others do well.
Some duckweed floating on the surface can round out the natural plant elements of the aquarium.
Rocks are pretty much uncommon in swamps and as natural decoration should be omitted or limited. Petrified wood is better yet and often imitates rotting wood. Driftwood often floats and may have to be weighted or wired down. The Combination Darter Aquarium. This design combines elements of the first three strategies to accommodate various species of diverse habitats.