Oh I'm also wondering how you get your cages 100% clean as well. Following your method will still miss some bacteria. Unless you irradiate your tanks or have a really big autoclave you are just as guilty to contributing to the problem as the next person. But by all means if you have a really big autoclave (which by the way you have been acting here I'm sure you do) I would love to see some pictures. The one's we have at work aren't that big. Snap a few pics for me quick?