Can i have 2 blennies in A 90g? I have a midas blenny already and trying to introduce my bicolor from my other tank that will be broken down. If its ok for them to live together then that would make me happy.
I had a lawnmower blenny for 6 months and then added a bi-color blenny (65g). The bi-color dominated the lawnmower for awhile and established himself in the middle of the tank. He even spent a few weeks carving out a nice hole in the top-middle rock in the tank. He dug out almost 2 inches into the rock and then perch himself there. The lawnmower learned to ignore and avoid it.