Air Driven Filtration

Cascade Sponge Filter

Penn Plax SWF2C Penn-Plax Smallworld Filter Cartridge, Multicolor

Penn-Plax Bubbler Bottom Filter (BF1)

PENN-PLAX Small World Fishbowl Under-Gravel Filter Kit - Comes with a Disposable Media Cartridge, Air Pump, Air Tubing, and Air Stone, Multicolor (EPSWF2)

PENN-PLAX Small World Aquarium Filter - Comes with a Disposable Media Cartridge (Bio Sponge, Carbon, and Zeolite Crystals) - Safe for Freshwater and Saltwater Setups

Penn-Plax Small World Replacement Aquarium Filter Media Cartridges (2 Pack) - Safe for Freshwater and Saltwater Setups, SWF1C

PENN-PLAX Small World Aquarium Air Pump and Filter Kit - Comes with a Disposable Media Cartridge (Bio Sponge, Carbon, and Zeolite Crystals)