Fish Doxy (Doxycycline) 100mg is one of the most trusted fish antibiotics for treating bacterial infections in both freshwater and saltwater ornamental fish. Formulated with pharmaceutical-grade doxycycline hyclate, Fish Doxy effectively combats common bacterial diseases such as fin rot, tail rot, columnaris, and septicemia, helping your fish recover quickly and thrive in a healthy aquatic environment.
Key Benefits
Broad-Spectrum Bacterial Protection: Effective against gram-positive and gram-negative bacteria, addressing a wide range of common fish infections.
Fast Recovery: Dissolves quickly in aquarium water for rapid absorption, promoting healing and reducing stress in infected fish.
Safe for Aquariums: Designed specifically for ornamental fish with minimal impact on beneficial bacteria, keeping your tank balanced and healthy.
Prevents Secondary Infections: Stops bacterial growth before it spreads, reducing complications and mortality rates.
Easy to Use: Capsules dissolve easily in water or can be added to medicated fish food for internal infections.
When to Use Fish Doxy
Use Fish Doxy fish antibiotics when your fish show signs of:
Frayed, rotting, or inflamed fins
Red streaks or open sores on the body
Gill disease or respiratory issues
Loss of appetite or unusual lethargy
Always ensure symptoms are caused by bacterial infections, not parasites or fungi, before treatment.
Directions for Use
Dosage: Dissolve 1 capsule (100mg) per 10 gallons of aquarium water.
Frequency: Repeat every 24 hours.
Duration: Treat for 5–10 days depending on infection severity.
Maintenance: Perform partial water changes between treatments. After the final dose, use activated carbon to remove any residual medication.
Active Ingredient
Doxycycline Hyclate – 100 mg per capsule: A potent broad-spectrum antibiotic that inhibits bacterial protein synthesis, preventing infection spread and promoting recovery.
Storage & Safety
Store in a cool, dry place (59°–86°F / 15°–30°C) away from moisture and sunlight.
Keep tightly sealed and out of reach of children and pets.
For aquarium and ornamental fish use only. Not for human consumption.