Thanks for that information Dan, it is much appreciated. I would rather take opinions from frog keepers with experience rather than that of any store as I have learned from past experience with my fancy goldfish that sometimes store employees (not all employees though) don't always have a clue.
I am totally in love with these frogs, even though I have only had them since Saturday I can already see that they have totally different personalities. One is very outgoing and already seems to come to the front and has even jumped onto the front glass to see what I am doing while the other one is quite shy and stays in one spot most of the time. I'm sure he/she is fine though, it gobbles its crickets down very eagerly when its feeding time.
Thanks again.