Barbs will attack neons and frogs, the Albino frogs only grew, the Albino frog which is sold throughout the tropical aquarium shops is the same as the African Dwarf and its name is the African Clawed, doesn't grow much bigger than the Dwarf. Frogs become stressed from being chased about the tank and such tank mates like the Tiger Barb will do that, they will try and nip their feet and the frog will try to escape and 9 times out of 10 they Will find a way. They climb up the heater/filter wires, they stay in the water most of the time but they do like to be able to sit just above it too, I remember watching them in the past resting at the top sitting on one of the filters.
Their also very picky eaters and unless you can be feeding them bloodworm on a regular basis they will starve because they wont get any of the dry food before the Barbs, best off buying some snails.