Thanks a lot, regarding question 4 (earthworms), why not include them - because they may cause damage to the plants? Or do they pose some problem to the frogs? this the reason why I have asked, if you do not include earthworms, what the reason for this move would be? Don't some frogs eat earthworms? Ok Darts are small frogs, but then again earthworms do not start their lifes as adults either.