ok so do you just put it in the tank? i didnt read that it created a "bath" like the other stuff does. I saw you had to soak food and it had to be digested. One dose do the trick?2 grams per 10gal is usually plenty. It will kill snails and may kill shrimp.
Panacur (brand name), Fendendazole (generic anme) is also used as a dog dewormer and easy to get at most pet stores.