I hate when people say:"your fish are unhappy". "They gonna die in a few weeks" "Your are noob, those fish cant be mixed together" . And then you find out the flamer is a 15 year old P.O.S. that thinks his knows stuff. I have angels, discus, mixed with tex, oscars and peole ALWAYS tells me that. Discus are kinda knew to me, but angels always had been part of my setups wiht agressive centrals and south american. I have been keeping discus for sometime and few months ago I decided to try them with my big cichlids. Works VERY FINE until now.