One of the best ways to keep your freshwater aquarium clean is through the use of an under gravel filter. The idea is that bubbles will draw waste and debris to the bottom of the tank where your cleanup crew (snails, plecos, etc) can take care of it. Whatever they don’t get can easily be removed by you, using a siphon.

Our available under gravel filters are listed below:


Lee's 2-1/2 Original Undergravel Filter, 6-Inch by 12-Inch
14.51 14.51 click here to buy Lee's 2-1/2 Original Undergravel Filter, 6-Inch by 12-Inch


Penn-Plax Replacement Media Cartridges (2 Pack) – Fits Multi-Pore and Undergravel “E” Filters – Provides Chemical Filtration (FC2)
5.99 5.99 click here to buy Penn-Plax Replacement Media Cartridges (2 Pack) – Fits Multi-Pore and Undergravel “E” Filters – Provides Chemical Filtration (FC2)


Penn-Plax Undergravel Aquarium Filter for 15-20 (high) Gallon Tanks – Two 11.2” x 11.25” Plates – Under Gravel System for Clear, Clean Water – Safe for Freshwater and Saltwater Tanks
9.63 9.63 click here to buy Penn-Plax Undergravel Aquarium Filter for 15-20 (high) Gallon Tanks – Two 11.2” x 11.25” Plates – Under Gravel System for Clear, Clean Water – Safe for Freshwater and Saltwater Tanks


Penn-Plax Undergravel Aquarium Filter for 10 Gallon Tanks – Two 9.5” x 9.5” Plates – Under Gravel System for Clear, Clean Water – Safe for Freshwater and Saltwater Tanks
11.45 11.45 click here to buy Penn-Plax Undergravel Aquarium Filter for 10 Gallon Tanks – Two 9.5” x 9.5” Plates – Under Gravel System for Clear, Clean Water – Safe for Freshwater and Saltwater Tanks


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)
26.66 26.66 click here to buy 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)


5 Pcs Aquarium Undergravel Filter Bottom - Under Gravel System for Clear and Clean Water, Fish Tank Under Gravel Filter for Freshwater and Saltwater
19.99 19.99 click here to buy 5 Pcs Aquarium Undergravel Filter Bottom - Under Gravel System for Clear and Clean Water, Fish Tank Under Gravel Filter for Freshwater and Saltwater


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
14.99 13.38 click here to buy 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


TEHAUX Hexagon Aquarium Undergravel Filter Tank 20pcs Convenient Fish Tank Bottom Filter Plate PVC Splicing Clapboard Bottom Filter (Black) Fish Tank Divider Aquarium Stand
27.09 27.09 click here to buy TEHAUX Hexagon Aquarium Undergravel Filter Tank 20pcs Convenient Fish Tank Bottom Filter Plate PVC Splicing Clapboard Bottom Filter (Black) Fish Tank Divider Aquarium Stand


OlimP-Shop 2 pcs 158 GPH Powerhead Submersible Pump Aquarium Fish Tank Undergravel Filter
35.3 35.29 click here to buy OlimP-Shop 2 pcs 158 GPH Powerhead Submersible Pump Aquarium Fish Tank Undergravel Filter


Lee's 5-1/2 Premium Undergravel Filter, 8-Inch by 16-Inch
29.45 29.45 click here to buy Lee's 5-1/2 Premium Undergravel Filter, 8-Inch by 16-Inch