I use Repti-bark (fir) or cypresss substrate. I've never used it but, here is a good video. I don't like linoleum because it needs to be laid using 100 lbs or greater weights to prevent it from bubbling, however self adhearing flooring tile looks like they'd work pretty good. (Yes there's a difference. sorry for being anal.) http://www.youtube.com/watch?v=SnIBIeoHjv4