So I still had my old "media" wrapped in plastic in the garbage from when i did a water change in my old tank on sat. Was it still wet? If it dried out I don't know how many bacteria might still be alive. I have taken it out of the plastic and put it in the new tank.
I also cut about 1/4'' of the current filter on the old tank and put that in the new tank. One thing I've learned since joining this sight, is to only rinse the filter media in old tank water and keep reusing it. Every time you toss out the media, you toss out much of your good bacteria, because that's where they live. And it's these bacteria that convert the harmful chemicals to not so harmful chemicals.
How long should I leave these in there for?