Antimicrobials for Fish Food That Are Easy
Antibiotics - How Much to Glaze a Pound of Food In
THIS IS YOUR BEST CHOICE OF THE CHART BY PRICE, SAFETY, AVAILABILITY AND EFFICACY.
A mess of other "fish" antibiotics are available at ValleyVet supply they are very proud of their ability to sell antibiotics bypassing the requirement for prescriptions. They've got almost every common antibiotic available with a fish on the package so no prescription seems to be required. They are OFTEN out of stock. You can use dosing from this online reference.