^ agreed. If you don't have an established tank to pull some media out of here is another route: most LFS use sponge filters to run their tanks. Ask them to wring out a sponge into a bag. A lot of bacteria will be present in the bag and you can dump it straight in the tank. This is the method I use.
I do have a big 40 gallon sump with alot of media. I was just asking because I'm planning on moving all my media from my old tank to my new 600 gallon tank....