I have a large male Micropthalamus that i have all but givien up trying to find a female for. He's currently housed in a 90 gallon tank solo. I want to put him in a larger tank in order to spread out some of my other fish that have gotten too big and need more space. I tried this once before but ended up putting him back in the 90 because i didn't want anything to happen to him. I want to try him with my large male Bocourti in a 125 to see how the chemisty works out. I know some of you have Micropthalamus and was wondering what other cichlids you house them with? Should i just keep him in the 90. I don't even know how aggresive he is but he seems pretty nasty just from watching him go after the catfish and the pleco i have in the 90. he's really fast and i'm betting he could get pretty aggresive if housed with other fish but i'm not sure. I have an adult pair P. Gibbiceps that need to be in a different tank and the 90 would work out well for them.