Blue ridge medicated fish food is very effective against bacterial diseases that affect koi and goldfish, including fungus, fin and tail rot, and ” hole in the side” (ulcer disease). Antibiotics are milled into the food instead of ” top-dressed” so that fish get the full dose of medication. We’ve added a generous amount of krill, making it irresistible to sick fish that would otherwise be reluctant to eat. This is the same food used by blue ridge fish hatchery. Feed three times daily for10 – 14 days. Not for use on fish intended for human consumption.