So its been a while since I have posted, but to make a long story short I lost my entire tank. I had a 75 with 6 discus all around 4". I moved back to school, made it through the move ok, all of the fish survived and within 2 days were active and feeding well, no signs of stress. About 1 week after my move I was going on vacation, so in preperation I was feeding heavy and doubled my water change schedule, then when gone they were fed minimal food, about 1/4 of normal, and I had a friend who knows fish, doing my normal water change schedule. I come back from my trip 6 days later to a black tanks with 6 dead discus and a room that smells like ass. Anyways I have since converted the tank over to an African Cichlid tank, I had the africans in a 55 and turned the 55 into a brackish. I am planning on coming back to discus in a few years when I am out of college and have the time and money to do the set-up right, and I dont have to move every few months. But to any others that have lost discus dont get discouraged, learn from the mistake find out what you did wrong and correct it, in my case any one care to comment on what might have gone wrong, my theory is that there was a foriegn substance (beer) put into the tank.