Charles,

My vet told me that antibiotics in the water don't do much good for an
infection in the fish, they will kill stuff in the water.

there are various medicated foods, if I were going to use one I would
get them from Dr. Johnson's place, www.koivet.com

Lots of good info there as well.

Thanks--I checked out the site. One LFS was a little rude when I suggested
that medicated foods might be more effective than antibotics in the water.

I don't know if the product you mentioned (which appears designed for koi)
would work for me, or even if my fish would eat it. I haven't found anything
like that locally--I'll look around a bit more.

Thanks.

Jonathan