I don't like leaving meds in the water column too long - from my experience it'll kill all the worms in 48 hours - add another day for luck then water change.
Do the same 1 week later - just to be sure - I don't imagine you'll see any evidence of worms after the initial treatment.
Do a really good gravel vac.
Ok I see, I'll follow your advice.
I have just spotted what appears to be two worms on the Rams fin. I've made a recording and I'm uploading it to YouTube now. I would appreciate it if someone could try to verify what, if anything, is on it's fin. From what I can see, the Ram has something on it's right handside fin and whenever it wants to itch itself it will itch it's right handside.
Ok here is the video URL, feedback appreciated: http/www.youtube.com/watch?v=50pemXRhFd4