Thank you to all for the advice. My fat boy Charlie has perked up and is
back to his old self (there's a photo of him on this page
http://www.devinjpoore.com/photo.html , big orange and white fish on the
bottom row of photos).

Now I have to figure out what was causing the problems in the water. I've
cut out the frozen shrimp and blood worms for the last week, and will give
it to them only occasionaly from now on, being sure to microwave it first.
I'm pretty sure I was overfeeding, and having problems with the bio filter,
so now I know better. I'm also keeping out the silk plants as I have found
some water plants they will not eat.

thanks again,

Devin