I have 2 fluval 306 filters and do a 50% w/c every 5 days, so I have a 4.5 inch Dempsey who is the king of the tank, I also have a mayan cichlid a jaguar cichlid , a flowerhorn(heavy trimac blood) a parrot fish, a convict, and a green terror that is pretty much blind from fighting the Dempsey. when these fish are fullgrown what is gonna happen, is one gonna kill off the others or what? , what should I take out for the longrun? wat goes good together?