I wound up with an Impossible tank set up due in part to lack of research and Impusle purchase of cool looking fish... And so i now have an impossible tank that seems to work quite well. I have a Male/Female pair of Electric Blue Haps (or whatever variety they actually are), and have read a lot of different things about their attitudes and behaviours. They reside quite happily and Peacefully in a 90 USG tank with Discus. When i first realized what i had done i immediately called the LFS where i bought the Cichlids and explained what had happened, The owner who is incredibly knowledgeable said that mixing them was not recomended but he had seen tanks in the past where it worked so to keep an eye on them and if there was an issue i could return the cichlids for a full refund. The next few weeks i kept a crazy close eye on the tank and everyone seemed to be doing quite well. Blue (as i call him) has a cave that he calls home and is mildly territorial around the cave but when other fish come too close he simply chases them off but once they are out of his space he leaves them be. As well when he is swimming out around the rest of the tank he does not bother the other fish, slowly the fish are learning to stay out of his cave. I still keep a close eye on the tank but decided things were probably going to be okay when i noticed that the female is deffinintely carrying eggs, something i figure would not have happened were the cichlids overly stressed. So im not saying they are compatable tank mates, more i think i lucked out with well behaved fish with good personalities, and figured i would share my success story here. Score 1 for dumb beginners luck. I will try to update on the Fry once they are in the tank... im not set up to isolte the female and young right now so going to see how they do in there... lots of places to hide for them though.