How aggressive are festae? With my stock if I got a younger festae would this work in your opinions?Or would I be asking for trouble? (Stock list includes: 1 Andinoacara Stalsbergi (True Green Terror), 1 Heros SP Super Red Severum, 1 Gold Severum, 1 Placidochromis Phenochilus(Star Sapphire), 1 Vieja Synspilum(Fire Head), 1 Hypselecara Temporalis (Purple Chocolate),1 Microglanis Cf. Iheringi (Bumble Bee Cat), 1 Jack Dempsey. )