Picked up a geophagus brasiliensis. I am fairly new to this type of fish and have read some conflicting info on conspecific aggression and captive adult size. I currently have one in a 75 and am looking at getting a second. I first read they are semi-aggressive when I got my original one and find that to be true but mine is still a juvie. After more reading I read they are actually very aggressive for geophaus and very conspecific aggressive. Also reading adult sizes anywhere from 7-11" and recommended tank size 40 -75 gallon. Wondering what MFKer expierence is.