Mysterious Illness

[bzotter]

I have a pair of true perculas and, about a month ago, one of them stopped eating and began a very erratic behaviorial pattern, often swimming upside down, running into walls, or laying on the bottom for minutes at a time. His (or probably her, since it is the larger of the pair) breathing is very rapid, he has lost a little of his color, and he is slow to react to stimulus (I can basically pick him up with my bare hand). There are no other visible signs of illness of any kind. I have him in a small QT with KENT MARINE RXP MARINE PARASITE being dosed every other day because an internal parasite (possibly in his brain) is the only diagnosis I can think of. I'm basically hand feeding him cyclop-eeze through a small pipet and I'm not sure if he's improving at all. Any ideas, suggestions, diagnosis? Also, can someone reccommend a website that will send me another perc of a specific sex, if he doesn't make it?