Question: is fenbendazole safe for shrimp?
Answer: Dewormer w/ Fenbendazole Luckily for us, it will kill these planaria flatworms. After some testing, we ended up adding approx 1 Gram of the fenbendazole to our 100 Gallon shrimp tank. So if you have a 50 Gallon tank, you could be safe in using .