when introduced to an aquarium? I just introduced 2 African Dwarf Frogs to my 14 gallon. In both of them, the thighs and forearms are inflamed, but not so much that it is critical. I think this is just their skin adjusting to the hardness of the gravel, because most of their holding tank at the store was covered with soft plants. Is this true? Or is it more serious? I'm just being overcautious.