They are about 5" TL I feed them all the usual stuff flake , pellets bloodworm ,daphnia never any beefheart thou I dont feed any of my fish mammalian protien (meat) they wouldnt get it in the wild
Easily upset I'd say , you gotta be religous with the wc's with preheated treated water.In the 3 years that I have had Discus some have wasted away and some thrive.