Best moss for Oriental Fire Bellies? - Real moss or exo terra moss mat?

[Bombina Bob]

Ive seen in the vancouver aquarium java moss grown on the edge of
water, it should remain soaking to grow on land successfully and will spread.
Ive had success using wild shag moss from the outdoors, its usually beneficial
if you get it from any herbicide or pesdicide free areas, ive had this moss in
my terrarium for over 3 months and has they love it! but i must say that exo
terra Forest moss poses an impaction risk.