I have a tetra filter for a ten gallon tank that i currently have in my empty 20 gallon...
It's the kind where it sucks water in through the bottom and pushes it through the filter cartridge and it flows out the top.
I'm curious as to how it works, and if i could take it apart and make a kind of sponge filter out of it(instead of having to buy an air pump).
Has anyone tried this(or taken apart a filter)? Any tips or ideas? I want to make it a sponge filter so i can use it in my ten gallon spawning tank next time i breed.