I got paranoid about him eating the moss and coco fiber not long ago
The moss could cause impaction, but I wouldn't worry much about the coco fiber. Unless the frog has particularly bad aim and is gobbling down tons of the fiber, it should pass through just fine.
1 Male Giant African Bullfrog
2 Woodhouse's Toads
11 Pacific Treefrogs
1 Dubia Roach Colony
2 Australian Green Treefrogs