Penn-Plax Undergravel Aquarium Filter for 20 (Long) - 29 Gallon Tanks – Two 14” x 11.1” Plates – Under Gravel System for Clear, Clean Water – Safe for Freshwater and Saltwater Tanks

PENN-PLAX presents the Clear-Free Premium Under Gravel Aquarium Filter. Those who’ve been around the aquatic block for a while know that Under Gravel Filters (UGFs) are a testament of time. This Filter is air driven and utilizes an Air Pump (not included) to cycle crystal clear water throughout your aquarium, while keeping a crisp and neat look inside. This means there’s less “moving parts,” making for simplistic and easy maintenance. It’s suitable for most 20 (long) – 29 gallon aquariums, and is safe for Freshwater and Saltwater setups. Biological, Chemical, and Physical Filtration: As air is pushed through the Air Stones and rises through the Lift Tubes, water is gently suctioned through gravel and the filter plates, allowing both air and water to pass through the Filt-a-Carb Activated Carbon Cartridges. As water continues to be drawn through, anaerobic bacteria collects and colonizes within the gravel and filter plates. PLEASE NOTE: Color of Under-Gravel Plates may differ from the images. Also Aerates Your Tank: Since the Clear-Free Premium Under Gravel Filter is air driven through the use of Air Stones and an Air Pump (not included), it also aerates your tank. In essence, your aquarium is being filtered and aerated at the same time, though the same system! It’s a filter and bubbler in 1! Items Included: The Clear-Free Premium Under Gravel Filter includes 2 Filter Plates 2 Adjustable Lift Tubes 2 Straight Airline Tubes 3 Filter Plate Connecters 2 Replaceable Filt-a-Carb Activated Carbon Media Cartridges Measurements: Each Filter Plate Separately = 14” (W) x 11.1” (D) Filter Plates Together = 28” (W) x 11.1” (D) Each Lift Tube at Filter Plate Base = 13” – 16” Shop PENN-PLAX for All Your Pet’s Needs: PENN-PLAX is a manufacturer and distributor of top quality pet supplies, who specialize in creating excellent pet products for animals, both great and small.