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
The Best Filter for 55 Gallon Aquarium in 2022 - Aquatic Eden
Best Filter For 50 Gallon Aquarium Tanks: The Top 7 In 2023
AAP, SeaChem Tidal High Capacity Aquarium HOB Power Filter