Ok, from what I am understanding, you want to replace the coco bedding with the moss for a pacman. I would say no. The coco bedding is much much much easier on the frog's system when he inadvertantly swallows some, which, being that he is the type that jumps his food, will happen. I would rather be safe than sorry.
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I think my frog owns a megaphone....

White's tree frogs : 1:1:0
Mantella viridis : 1:1:2