You've already been told what would the best broad spectrum antibiotic for sharks - that would be Nitrofurazone.
If used correctly the risks to the shark is minimal.
It would be best to put the shark in a hospital tank for the treatment. Since the Nitro can also kill the good bacteria in your tank.
If used correctly the risks to the shark is minimal.
It would be best to put the shark in a hospital tank for the treatment. Since the Nitro can also kill the good bacteria in your tank.