it is pretty amazing how much many at LFS do not know.
however, knowing that Levamisole Hcl is a pig/sheep wormer and is used specifically for these it does not surprise me.
I have a good Friend who is a large animal vet.
he mainly works on horses and cows..he had to look up the drug to tell me more about it..and was not aware of it's use on fish.
he did give me the scoop on many other meds used for cats, dogs, etc and even how soluable they are in water.
keep in mind that there is also a form of levamisole that is not as soluable as Hcl.