Order some Lavamisole online for the future.
I had 5 anorexic Albino Marlboros and it turns out that anorexia is caused by an internal parasite. I was too late to save four of them ('cause I'm stupid), but I saved the 5th. The person that I got them from had had them for a year with no problems, but the stress of the move from his place to mine either caused the parasite to become more active, or the stress made them unable to fight the problem any more. Turns out a peaceful fish can have them dormant at all times (similar to gill flukes)