I just got my first African Dwarf Frog. I spoke with the a member of the pet store team at length about care and feeding. I have had him for about three days. for the last day or so he has spent a significant amount of time climbing completely out of the water and and sticking to the side of his tank. From what I have read in posts in the forums here and have herd from other owners these guys are fully aquatic. Should I be worried?