Its hard to find good information or profiles for this fish it seems. Has anyone ever owned one? From what I've read there are mixed reviews, some saying they are very aggressive and some saying fairly peaceful.. I know every fish has its own personality butI ask because I am considering adding one. I currently have an oscar, some severums, soon to add a chocolate and catfish. Would this work? How big do they normally get. Found one source saying 8-10 in