I have had my discus tank for several months now and have had a fair amount of good luck raising them so far . That being said i have run into some difficulty as of late. i recently added a large snakeskin discus to my existing population. He or she is the biggest fish in the tank now and it seems that by adding this fish to the tank has changed the tank dynamic. The prob I am having is that my 2" red marlbro has been hiding in the corner and hasn't moved from that spot in about a week. I am worried that if this continues the fish will not last long. i also have not seen him eat in that time. i have a small quarintine tank that i could move him to but i'm not sure if that would be a good idea since discus prefer the company of their own species. Please help ! Open to suggestions. thanks