Wetman, thanks, I will consider using it as well for my quarantined fish.
Goldfish freak, hello again. Yes, the water change I made was with water directly from the tap. I pre-treat my change water in a bucket with dechlorinator and baking soda. I've been doing this ever since I got my tank in December and haven't had any problems with fish becoming overly stressed. They don't lose their color and my SAE's actually go after the hair on my arm when I do my weekly maintenance. The PH from my tap water is 7.4 and in the tank it's between 6.8 to 7.0 depending on the time of day. I've done PH tests about an hour after my water changes and it was always been within 0.1 - 0.2 difference of the PH reading before the water change. Any suggestions on getting the water in the bucket down to a PH of 7.0 which won't be harmful to my plants?
I suspect that it probably was the change in the chemistry of the water that caused one of my fish to scratch itself. Since I'm paranoid about if they have flukes or not I spent a lot of time watching them today and they didn't scratch about the tank as far as I saw. I will continue to check throughout the week.
As for the pantyhose idea, I will try it and let you know. I don't know how effective it would be when using prazi in powder form, however, I managed to get my hands on tablets (yay!) and am thinking that it just might do the trick.
Rocketman, I'm not overstocked at all

Quite the contrary, actually. I do 50% weekly water changes to reset the proper nutrient levels for my plants.
Dave, in a previous post, Cearbhaill said that he got prazi from Goldfish Connection for $15 US for 100 grams (3.5 oz).