Penn-Plax Undergravel Aquarium Filter for 40-55 Gallon Tanks – Four 11.25” x 11.25” Plates – Under Gravel System for Clear, Clean Water – Safe for Freshwater and Saltwater Tanks (CFU55)

NOTHING LIKE OLD SCHOOL: The Clear-Free Premium Below Gravel Filter is air pushed and makes use of an Air Pump (not included) to cycle crystal clear water all through your aquarium, whereas preserving a crisp and neat look inside. This implies there’s much less “transferring elements,” making for simplistic and simple upkeep. This filter is appropriate for many 40 – 55 gallon aquariums.
BIOLOGICAL, CHEMICAL, AND PHYSICAL FILTRATION: As air is pushed by means of the Air Stones and rises by means of the Carry Tubes, water is gently suctioned by means of gravel and the filter plates, permitting each air and water to cross by means of the Filt-a-Carb Activated Carbon Cartridges. When water continues to be drawn by means of, anaerobic micro organism collects and colonizes inside the gravel and filter plates.
ALSO AERATES YOUR TANK: Because the Clear-Free Premium Below Gravel Filter is air pushed by means of using Air Stones and an Air Pump (not included), it additionally aerates your tank. In essence, your aquarium is being filtered and aerated on the similar time, although the identical system. It’s a filter and bubbler in 1.
ITEMS INCLUDED: The Clear-Free Premium Below Gravel Filter contains 4 Filter Plates, 4 Adjustable Carry Tubes, 4 Straight Airline Tubes, 9 Filter Plate Connecters, and 4 Replaceable Filt-a-Carb Activated Carbon Media Cartridges.
MEASUREMENTS: Every Filter Plate Individually = 11.25” (W) x 11.25” (D) / Filter Plates Collectively = 45” (W) x 11.25” (D) / Every Carry Tube at Filter Plate Base = 13.25” – 16.5”