She's eating a lot and losing a ton of weight and has clamped fins do you think it's a parasite and if so how do I help her?
Looks like an internal parasite (white poop, no scars) Treat with 2ppm levamisole hydrochloride. Treat the whole tank as they are contagious.
I concur. Was dealing with the same thing about a week ago. Used Metroplex, Sulfplex and levamisole and they all worked great. She's probably not eating either, but you're on the clock and must remedy the parasites ASAP ok? Chances are, when the parasites are gone, she'll eat like a pig. : )