[jbeetle]

I have used both green leaves (taken off of tree and found on ground) and dried brown ones, and think both are fine and make it look more natural. I would use mainly dried ones for a top layer off leaf litter though, just cause of off-gasing (and wouldn't use them if there is very little or no ventilation). I usually mix the more green leaves into my substrate mix, but I do add a couple of them on the top of the dried leaves. Both will break down and need to be replaced, but thats sort of the point of it... as well as adding tons of comfort for the frogs.