Penn-Plax Undergravel Upgrade Kit

The Penn-Plax Undergravel Upgrade Kit is for converting all 1" lift tube undergravel filters (Perfecto, Aquology, Hydroclear, etc.).

Includes:

• TWO Filt-A-Carb (FC4) Disposable Carbon Cartridges containing top quality activated carbon to remove harmful gasses, odors, and unsightly discoloration
• TWO Fishguards, molded right into each elbow, for preventing fish from entering the lift tube
• TWO Gravelguards for preventing gravel and fish from getting under filter plates when lift tubes are removed.