bevoholic
Aquarium Advice Freak
Would work fine though most shops sell them for a few bucks. I always keep one around for quarantine. I just put a filter pad from my main tank under it and it's like instant cycle! Gotta love simple solutions.
I have a pump in my 5.5g that I'm going to take out since I don't need it in there anymore. I only had it in there for when it was cycling, but now that's done with.
How big of a piece of sponge should I use, and should I bury it?