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API E.M. Erythromycin
API E.M. Erythromycin
API E.M. Erythromycin
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*Erythromycin powder for use in freshwater and marine aquariums
*Delivers broad spectrum treatment and control of bacterial diseases
*Effective against Furunculosis, hemorrhagic septicemia, and more

Quick dissolving pharmaceutical-grade erythromycin powder for effective treatment against a wide variety of bacterial fish infections. API E.M. Erythromycin delivers broad spectrum treatment and control of bacterial disease, such as body slime, mouth fungus, Furunculosis (open lesions and swelling), bacterial gill disease and hemorrhagic septicemia (blood spots without sign of skin damage). For use in both freshwater and saltwater aquariums.

Active ingredient: 200 mg Erythromycin per packet. Each packet treats 10 gallons. 850 grams bulk jar treats up to 3,270 gallons.

Directions for use
For best results, remove activated carbon or filter cartridge from filter and continue aeration. For each 10 gallons of water, empty one packet directly into aquarium. Repeat dose after 24 hours. Wait another 24 hours and then change 25% of the aquarium water. Repeat this treatment for a second time for a total of four (4) doses. Then make a final 25% water change and add fresh activated carbon or replace filter cartridge. Treatment may be repeated if necessary.

Keep out of the reach of children. For aquarium use only. Not for human consumption or for the treatment of fish intended for human consumption. Avoid contact with skin and eyes. May cause irritation.

Diagnostic Chart
Infection: Description:
Hemorrhagic Septicemia A bacterial infection of the bloodstream. Fish may show blood streaks on the body and fins, bleeding (red patches) and localized swelling.
Mouth Fungus Common bacterial infection that affects the mouth and other soft tissue. Fungus-like in appearance with red periphery. If left untreated, severe erosion and lesions will develop.
Open Red Sores A bacterial infection that causes open red sores on the body. Infection can range from very small ulcers to deep skin lesions. Coloring can range from reddish or gray ulcers to very dark areas associated with necrotic (dying) tissue.
Bacterial Gill Disease Fish may breathe heavily and show bright red gills. Fish may sit at bottom of aquarium or near the water's surface. However, visual diagnosis is often difficult.
Fin & Tail Rot Fins appear ragged and split. In severe cases, fins and tail are almost completely eroded. Secondary fungal infections, observed as white, "cottony" growth, commonly occur.
Body Slime & Eye Cloud Eyes develop a white haze and/or protrude from the head. Slimy patches appear on the body. Fish may scratch on objects and exhibit rapid breathing. Infection may cause abnormal osmotic function resulting in fluid accumulation to the eyes and/or body.

WARNING: WARNING: This product can expose you to chemicals including Silica, crystalline, which is known to the State of California to cause cancer. For more information go to

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