I figured flowing water would help to keep bacteria and such down since its not just stagnant water. I know the deal about the impaction with moss but I was wondering if that still applied to live moss since it is attached to the ground is isn't just bunched up in a pile. Since live moss would be so short and attached to the ground I didn't figure he would be able to get that into his mouth. Would that be true or am I just missing something lol.