You don't need to put them in a brackish setup yet if they're only 3". They need their own tank for a brackish setup. You can accliminate them now or when they grow a bit bigger.
I have to say that I find them very entertaining,
always on the move and up to some kind of antics.
I will also say that they are a nightmare to get a decent pic of
definately one of the most difficult subjects I have tried to shoot.
Thanks for all the feedback on them guys, much appreciated.