Hey,
I just recently got 4 ruby red discus. They are in a 85 gallon tank by themselves. It is pretty much a barebottom tank with just a tiny bit of gravel just to cover the bottom. Anyways the fish are eating bloodworms and swimming around but they have the vertical stress bars and they havnt gone away since i got them. Is this normal? I am new to discus and just want to make sure they are not too stressed. As you can see in the picture all three of the fish are showing vertical stress bars.