| In reptiles we use panacur, metronidazole (flagyl) and droncit/drontal deworming. As far as i know the only dewormer out of that list used in fish is metronidazole. It comes in a powder form, you give the amount the directions call for mixed in frozen food. I'd add garlic to the mix because even to the reptiles this stuff tastes absolutely horrible.
Drs. foster and smith had a line of pelleted foods out with dewormer directly mixed into each pellet. You might want to give that a try.
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