In my experience with those kinds of filters, replacing the cartridge with an aquaclear sponge is a vast improvement in filtration capacity. A 10 gallon tank shouldn't be stocked so as to worry about bioload.
forum community dedicated to tropical fish owners and enthusiasts. Come join the discussion about species,breeding, health, behavior, aquariums, adopting, care, classifieds, and more! Open to fish, plants and reptiles living in freshwater or saltwater environments.