I have a 75 gallon with 6 discus in it and two of my discus are not eating. This has been going on for about a week now and I am starting to get a little concerned. I had two other discus that just died recently to the same cause and I feel that I need to do something. The two discus that are not eating are two of the bigger ones in my tank. The other four are doing very well and eating all sorts of food I put in the tank without hesitating. I had two discius in the tank for about 2 months because I didnt have enough money at the time to get more (i know they are schooling fish) and I got my new ones about 5 months ago. The discus seem to chase eachother around the tank quite frequently, but not over the food. The two original discus swim around the tank and dont usually pay attention to the other discus. Could this be a territory problem? the new discus seem to be intimidated by the two original discus. The two discus also seem to have much brighter colors then the new discus, which are darker and paler then the two old ones.the original discus were in there for quite a while wothout any other discus in there. I would sure hate to see these beautiful fish die to something stupid. Knowing me it is something so obvious that I am just looking over.