Hi, I've finally bought another WTF to go with my other 2, its cool cos I've been looking for one that isn't the same colour as the others, this one is somewhere inbetween

Anyway, I put the new frog in a a smaller plastic tank next to the main tank, I did this thinking that the sooner all the frogs meet each other the easier it would be when they have to live together (when the new 1 is big enough). Immediatly one of the bigger frogs jumped onto the side of their tank, seemingly trying to get to the new one.. So I have now moved the smaller tank away so that they can't see each other.

Should I keep them seperated untill they live together?
I think its gonna be a good few months before they can live together, so should I introduce them slowly?
How should I go about it?
what would you lot do?