I've always loved datnoids but my biggest tank is a 125 so I never gave them much thought. I recently had 11 days off from work which lead to a little googling and my intro to the AT. Question one, what is aggression like to non-datnoids? Profiles give them the same generic description every cichlid short of the heavy weights receive. Question two, this one is also very vague in profiles so how small is too small for tankmates? The tankmates are 8" rotkeil severum, 4" green severum(young and growing quickly), 2 7-8" geophagus iporangensis, 6" acarichthys heckelli, 7" crenicichla sp bellycrawler, and 3 4-5" silver dollars.