Lees S13245 48 x 12 in. 55 gal Original Undergravel Filter Cartridge - Walmart.com
Fish Tank Double Sponge Water Filter - hgger
KDF 55 MediaGuard
Amazon.com : Penn-Plax (CFU55 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 :
20-inch 2-stage Big Blue Whole House Filter with KDF-55
Model 55 Power Filter — Aquarium Masters
Greg Bickal's DIY Series: How to build an above ground filter using a 55 gallon barrel
My current setup is a 55 gallon tank with three Oranda and one Ranchu. Filtration is three sponge filters + a canister filter rated for 75 gallons (265 GPH). If I add
Amazon.com : TARARIUM Aquarium Power Filter w/Surface Skimmer for 20-55 gal. Saltwater & Freshwater Fish Tank Hang on Back Filter 158GPH Double Waterfall Suspension Oxygen 4-Stage Filtration System : Pet Supplies