Biological filter for 55 gallon freshwater aquarium
I'm thinking about making my own biological filter for a 55 gallon freshwater aquarium. I have a 5 gallon tank that's just sitting around. The theory is that I should be able to fill it with media, a mechanical filter, and use a pump to circulate the aquarium water through it.
Am I right in my thinking?
Is a 5 gallon filter enough for a 55 gallon aquarium?
Can anyone suggest a pump to move that amount of water?
Thanks in advance!