Isn't that a hydrocynus vitiates that he has?Here is a Singapore hobbyist's video of his tiger fish in a community tank and doing well. He appears to rule the tank but I do notice scales missing from taking on somebody. However it is a good video showing his speed and dominating personality. Mine are are wimps compared to him.
http://www.predatoryfishkeepers.com/forums/showthread.php?7326-chapalang-community-feeding-video