Maracyn Freshwater antibiotic (Erythromycin) Powder Packets are recommended for the treatment of body fungus (Columnaris), fin and tail rot, popeye, gill disease and secondary infections. Erythromycin is a broad-spectrum antibiotic which has been shown to be effective against a number of pathogenic bacteria associated with ornamental fish disease.

Benefit: When used at the recommended dosage Maracyn maintains a therapeutic level of the drug within the aquarium. Maracyn does not color the water and will not interfere with the biological filter.

Use: Maracyn is primarily effective against gram-positive pathogenic microorganisms. Symptoms of clamped fins, swollen eyes, heavy or rapid breathing, patchy coloration, change in swimming behavior or corner hiding can be signs of possible bacterial infection. All suspected bacterial infections should be treated immediately. Powder should be added to the tank (not the filter). Use of a hospital tank is recommended. Use 1 packet per 10 gallons of water and repeat every 24 hours for 5 days. After treatment, Maracyn can be removed by water changes or fresh activated carbon.

Active Ingredients: Each packet contains 200mg Erythromycin activity.