These are older pictures, but you get the idea.

This is more recent

About a week-week and a half ago he stopped eating.
When I tried to feed him, he just gives me the cold shoulder,so I let it go and tried again for the next few nights.
A few days ago I started to become concerned, as he was still not eating.
About 3 nights ago he started acting like he had a stroke or something. I will attach a video, but he swims and can't control himself.
He spins, and flops and I am afraid of him hurting himself even more, such as head trauma or scratching his eyes on rocks etc.
So immediately I tested the water.
Ammonia, PH, Alkalinity, Nitrite, Calcium- everything came out FINE
Nitrate was a little high due to "old tank syndrome" but absolutely NOWHERE near lethal.
So I immediately did a 40 gallon water change while I put him in a 5 gallon tank.
Put him back in and same thing, he can control himself sometimes, other times not.
If we hold him, he sits there fine. If we don't he wedges himself somewhere where he won't move.
He curls up and only uses his left fin, and curls his tail up.
But when he wants to move he uses his right and his tail just fine.
Today he is sitting on top of my powerhead, still can't swim right. and I have no idea what to do.
I also noticed the tips of his fins starting to turn red because I can see the arteries.
He also breathes heavier than normal, his gills flap at about 62 times per minute.
Which seems and looks much too fast.
I don't think he has a chance and don't want him to suffer, but I don't want to euthanize him if he has a chance.
Any help is greatly appreciated, but I fear there is nothing that can be done.
It is sad to lose the best looking Porc I have EVER seen.
What do you guys think could be going on?
Stroke? Heart attack? Some neurological damage?
http://www.youtube.com/watch?v=9zHMEFr9 ... ature=plcp
