Won't it effect shrimp/snails etc?
I think Interpet Anti Crustacean Parasite may work too.
Shrimps and snails should always be removed when using parasite meds.
The interpet crustaceon meds dosn't treat flukes, it treats gill maggot, anchor worm, fish lice.
Also in completely wipes the beneifical bacteria out in the filter.