Erythromycin Fish Antibiotic Powder – Treats 200 Gallons

Erythromycin Fish Antibiotic Powder – Treats 200 Gallons is a bacteriostatic aquarium medication intended primarily for gram-positive bacterial problems in ornamental fish, with additional activity against selected gram-negative organisms. This professional-strength aquarium medication is packaged to treat up to 200 gallons when used according to the labeled dosage.

Professional Aquarium Medication for Ornamental Fish

Developed for responsible aquarium care, this concentrated formula gives fish keepers a concentrated treatment option for use in freshwater aquariums, saltwater systems where permitted by the label, quarantine tanks, hospital tanks, and ornamental pond setups. The powder format supports accurate measuring and controlled treatment without unnecessary fillers.

Key Benefits

• Supports treatment of fin and tail rot, mouth and eye sores, cloudy or protruding eyes, popeye, and bacterial infections.
• May be used for conditions commonly described as molly disease, tetra disease, wasting, or swollen belly when consistent with the product label.
• Also labeled for cyanobacteria or red-slime concerns in aquarium systems.

Commonly Used For

• Fin Rot
• Tail Rot
• Mouth Sores
• Eye Sores
• Cloudy Eyes
• Protruding Eyes
• Popeye
• Molly Disease
• Tetra Disease
• Cyanobacteria
• Red Slime
• Swollen Belly
• Wasting Disease
• Bacterial Infection

Correct identification of a fish health problem is essential. Similar symptoms may result from water-quality stress, parasites, bacterial disease, injury, or environmental conditions.

Directions and Dosage

1. Condition aquarium water before dosing.
2. Use 1/4 teaspoon per 20 gallons of aquarium water.
3. Repeat after 24 hours and perform a partial water change between treatments.
4. Label guidance recommends an extended bath of at least 5 days and no more than 10 days.
5. Stop treatment if no improvement is visible within 5 days. Wait several days before introducing another medication.

Important Treatment Guidance

Erythromycin can interact with other treatments, so avoid combining medications unless directed by a qualified aquatic professional.

• Test water quality before and during treatment, including ammonia and nitrite.
• Use a dedicated hospital or quarantine tank whenever practical.
• Remove or pause chemical filtration and other equipment only when the product directions require it.
• Observe fish closely and discontinue use if unexpected stress or adverse reactions occur.
• Store tightly closed, away from children, moisture, heat, and bright light.