Does it swim around in circles? Can it swim 'properly' upside down? I have had fish like this and they never recovered so I had to put them down.
Chris-
Make it the way YOU want it. Look around at plants, driftwood etc and buy as you see things YOU like.
Not much point setting up someone elses tank, eh??
Alan and ajbroome are the people to talk to these about! Alan is around quite often and you can catch him in chat most nights at around 9pm.
AFAIK ajbroome is the president of the NZKA.
Welcome aboard
Chris-
I have a one eyed discus. The thing with mine is that he lost his 'bubble' around the eye. This happened when the LFS worker was catching him. He doesn't have any of the symptoms that you said, he mainly gets picked on by my other discus.
Chris-
He said he made a mistake and it's actually 20 gallons. Though, I do recommend hunting around and getting it second hand. It will be MUCH cheaper and you will buy a bigger tank.
I might have a submersable Shark filter and 200watt heater for sale. The shark filter has all the media and the heater has never been used.
PM me I am in Auckland.