my silver aro use to live alone. but my snakehead got too big for his 55 gallon so i moved him to the big tank with the silver aro. on the first day he attacked the aro twice and after that he only bothers the arowana once in awhile. the arowana stopped eating mp(which is what the snakehead eats. he snatches) and now only eats live mealworm. Like Wtf. The snakehead doesn't even bother it anymore. got ways to make snakehead less fierce? and silver arowana more..brave. less jumpy.