Oxolinic Acid Powder 100%, 50 grams. USE: Anti-bacterial, gram negative bacteria. Used when fish die for no apparent reason, when other medications are not helpful. Works well for Koi affected by Aeromonas (hole in the side) when mixed in feed.
DOSAGE: 1/4 teaspoonful per 30 gallons, every 3 days with a complete water change before each treatment. Or, 2 teaspoons per pound of Koi food. Feed for 14 - 21 days.