Originally Posted by Derek
I saw a thread somewhere else on PlantedTank about one of you running an Eheim Aquaball internal filter on a little tank. Big Al's has a 2206 for $32.99 (Canadian) which is not much more than what an AC Mini goes for...
I think it would be way too big for your five gallon. You can see it on Momotaro's 15g in the Photo Album forum.