Ok iam getting my new 20 gal tank today now heres the prob my old little tank is bottom filtered so do I just suck some old stuff out of the bottom filter and put it in the new filter also any suggestions on extra things to buy like water kits which I have but any thing else would be helpful I want to star my fish off right and not rush into anything thanks. I also have floating lettuce in my little tank should I put some of it in my new tank right away.