I have 3 bicolored blennies in my 150-they now get along very well-I added them all about the same time- they did have some issues at first - chasing each other-but now they all get along great. Did not know that you should only have one of that species per tank. Did not do my research.... But I have alot of rock and hiding places for them. So they did ok! And adapted well to each other!They all have their own spot in the tank. I am sure they would have not done well in a smaller tank without good hiding spots. The bigger one will surely terrorize the smaller ones. :happyfish :happyfish
I have a 75 that used to be a 30 with a lawnmower in it. i got about 60 more pounds of rock established it all , put a bicolor in there and im thinkin the lawnmower stressed it. the lawnmower also has killed 2 jawfish. my oppinion