I had to put my Oscar down tonight! Ive had him for over 6 years at 1". He has had HITH for about two years. It never got worse and he has been active normal and eating fine. He recently has become more and more angry. Tonight he spazzed out and smashed around in the tank and then was floating at the top sideways. I decided it was time, since I believe he was suffering. It was very very hard for my wife and myself! Sad day for us!