1633 PennPlax Hang-On Filter 100 gph w/cartridge Pumps 100 gph, external filtration for tanks up to 20 gallons.
Revolutionary BIO-FALLS QUAD-FILTRATION SYSTEM! *Polyfiber Floss Cartridge - Activated Carbon Cartridge Internal Sponge -
External Bio-Falls. Bio provides separate biological filter area, maintains bio-filter even when cartridge is changed.
