I have a tiger barb nonstop chasing fish same as their size, And my mollies are agressive and killing fish, My first fish that died look like it got stuck and suffocated, Then the 2nd fish looks like it suffocated too instead a molly looked like i was helping it get unstuck, My 3rd one died and i realized 2 mollies were ramming it while the other one was pushing a fish to the corner, Then i realized the death cause of my fishes were agreesive mollies, What should i do about the mollies and the hyper active barbs?