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:


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)
13.99 13.99 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)


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
16.19 16.19 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


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
14.45 14.45 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
11.49 11.49 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 Replacement Media (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 (2 Pack) – Fits Multi-Pore and Undergravel “E” Filters – Provides Chemical Filtration (FC2)


Lee's 2-1/2 Original Undergravel Filter, 6-Inch by 12-Inch
17.89 14.92 click here to buy Lee's 2-1/2 Original Undergravel Filter, 6-Inch by 12-Inch


TEHAUX Hexagon Aquarium Undergravel Filter Tank 20pcs Convenient Fish Tank Bottom Filter Plate PVC Splicing Clapboard Bottom Filter (Black) Fish Tank Divider Aquarium Stand
22.59 22.59 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


CORISRX BEST OF YOUR LIFESTYLE Undergravel Filter 11.8" X 5.9" Fish Tank Under Gravel Filter
14.97 16.47 click here to buy CORISRX BEST OF YOUR LIFESTYLE Undergravel Filter 11.8


Penn-Plax Filt-a-Carb Universal Carbon Undergravel Filter Cartridge, 3 Packs of 2 each
29.99 29.99 click here to buy Penn-Plax Filt-a-Carb Universal Carbon Undergravel Filter Cartridge, 3 Packs of 2 each


Lee's Pet Products ALE13202 Undergravel Fishbowl Filter, 2-Gallon
14.73 14.73 click here to buy Lee's Pet Products ALE13202 Undergravel Fishbowl Filter, 2-Gallon