Well, I am guessing the information I have gathered is correct since no one is really disputing it. I was wondering how many of ya'll use sand and how many apen? I plan to feed them in a seperate tub so I don't really need to worry about impaction, but I was wondering more for convience and economics. I use play sand from Home Depot for my Leopard Geckos, is that okay to use with them? Would aspen be cheaper? Also when ya'll clean out your tanks, do you change all 3+ inches or just a surface clean? With our ball pythons we spot clean everytime there is poo then do an all over change about every 3-4 weeks. Does that sound about right? The help so far has been great; keep it coming!!