Alright guys, I have a question.. Oldest son school is doing a "pet" adoption and of course he picked something I knew nothing about... He picked that he wanted a Dwarf African Frog or Fiddler Crab. Now here's the question...

I have a 30 gallon tank that has some mollies, tets and a few platys. Would it be ok to put one of these "new" pets in that tank or should I setup a new tank?

I have a 3 gallon and a 10 gallon tank I could setup.. If I setup a new tank what needs to be done for these? He is only getting one...

Thanks...