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A 50 gram jar of Erythromycin is the equivalent of 200 packets commonly available in the fish hobby.  Save by purchasing in bulk!

Erythromycin is a common antibiotic used to treat a variety of bacterial ailments. Non-toxic to invertebrates.

Common behavioral changes that indicate a bacterial infection include clamped fins, swollen eyes, gills held open, pumping gills and gulping through mouth, patchy coloration, change in swimming behavior, becoming shy or hiding, etc.


Treatment Against: Columnaris, Fin and Tail Rot, Popeye and other diseased caused by Flavobacterium columnare, Haemophilus piscium, Aeromonas punctata, Aeromonas hydrophila, and Cytophaga aquatilis bacteria. Used in freshwater or saltwater.


Dosage: 250-500 mg (1/4 teaspoon) per 20 gallons every 24-hours with a 25% water change prior to dosing.  Repeat 10-14 days. Can be stopped after 5 days if no improvement.

Erythromycin Powder


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