Penn Plax Filt-a-Carb Universal Carbon Undergravel Filter Cartridge helps keep your aquarium water clean. Fits most undergravel filters. Contains quality activated carbon that removes harmful gases and odors and clears up discolorations. Quick easy and disposable.
Helps keep tank water healthy
Trouble-free maintenance
Ready to use
Clears up unsightly discoloration
Instructions: Rinse thoroughly before placing in filter. For best results, replace every 2-4 weeks.
