I've done a search on here for how to treat rocks etc.
The general consensus is to soak them for 24hrs in 1:10 Bleach:Water solution, then oven bake for 1hr at 100*F? Does this sound right? Or are there other methods?
Also is this for ones brought home from the wild? The ones i plan to get are from an aquatics/reptile center? Now i know not to presume they are treated already so would the same count for them?
Personally id say it would be a lot simpler than that for rocks. Unlike wood nothing is going to be living in there deep. it would only be on the surface so putting them in a saucepan and boiling them would kill any bacteria. I think that would be enough. More people will advise soon.