[alprazo]

Fallow works for obligate parasites like ich a velvet that have short life cycles. Monogenia, Cestodes, nematodes, Trematodes, and pods, though parasites can often live past the typical fallow period for ich. Look at the Cimex lectularius (bed bug). They feed solely on blood. We kept one alive in a jar at work for nearly a year without a meal.

I used to treat all of my new sharks with Dimilin to kill amphipods and Copepods. I can't find it anymore though.

As for Prazi, all meds pose a risk. I believe that it is a safer one.