Thinking of getting 3 of the green dot puffers, guy at fish store said they would do just fine in our tank, it's a 55gal, we currently have 3 green severums, 3 blue gourami, 3 white gourami, 3 honey gourami, 1 yellow and 1 chocolate gourami, 3 tigar barb, 3 danios, 1 silver dollar, 3 sword tail, and 1 sucker fish, he said 3 gds would be just fine with what we have, none of the fish in the tank seem aggressive right now the gourami like to pick on each other sometimes but no other fish, what is everyone's suggestion on here??? Thanks!