The past couple of nights, my Oscar's been freaking out. I have no clue why it is, but it's tearing itself up! He's thrashed himself to the point where his scales are being knocked off and giving himself shallow cuts. I would take out the decor (3 different sized PVC pipes), but I don't see how that would help. And I think it would cause more trouble with the other fish in tank with the Oscar. Anyone have a clue or suggestion why this is happening?