Penn-Plax Smallworld Replacement Filtration Units remove harmful gases, odor and discoloration. Disposable, quick and easy filtration units for use with the Smallworld Filter. Each package contains two filtration units.

• Air Filter and Filter Kit replacement cartridges for Smallworld SWF1
• 2 replacement cartridges in each pack
• Quick, easy, disposable

Replace cartridges monthly for healthy aquarium water.