“When other medicines and antibiotics fail, this one has come through for my fish. But I am always careful with antibiotics, as, what works for one fish may not work for another and so I always prepare an antibiotic and medicine free 'rescue tank' when administering any fish meds or antibiotics and monitor my finned babies closely... and I quickly remove any fish that shows odd behavior or appears upset or lethargic and place them in the medicine free rescue tank. Fish, just like some people, can have adverse reactions to meds that might otherwise be good for others. Oh, and I don't have snails or crustaceans in my tank so you might want to check first and see if the medicine is safe for them before using it so you can put them in a safe tank while treating your finned babies. :)”