So guys, I've been thinking about switching my filters to use cut filter sponge media instead of cartridges, since its more practical, less expensive, and I don't like the carbon in cartridges.
However, I'm not sure about the best way to do this without ruining my cycle.
Just to be clear, my filters are Topfin Whispers for 10 gallons. They also have some kind of small black sponge in front of the filter cartridges, and I'm not sure what it is. I've just assumed it was a home for BB.
If anyone could give me step by step instructions on this and/or reccommend a good brand of filter media to use (preferably sponge) I would really appreciate it :)
Keep in mind I am partially doing this to save money, so nothing particularly expensive.