Smallworld Filter Cartridges (2 pack)
The best way to keep on top of your water quality is regular changes to your filter cartridges. The Penn-Plax Small world Filter cartriges come in a handy two pack, contains a small sponge to remove solid debris and a carbon cartridge to purify and polish the aquariums water. They are very easy to replace. Made Specifically for: Pen-Plax living world filters.