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Fish/Bird Zithro 250mg 12 Tablets

$45.99 $65.99

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Check Mark Notice: Dog antibiotics sold out. Fish antibiotics (same grade & content) in stock — select “Fish” in variations to order.

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Fish/Bird Zithro (Azithromycin) 250mg – 12 Tablets

Broad-Spectrum Bacterial Treatment for Aquarium Fish

Fish Zithro 250mg is a fast-acting, broad-spectrum antibiotic formulated with Azithromycin to treat serious bacterial infections in freshwater and saltwater aquarium fish. From fin rot to gill disease and ulcers, this powerful fish medication targets internal and external infections, restoring aquatic health without disrupting beneficial bacteria.

Explore more premium medications in our Fish Antibiotics Collection.

Benefits of Fish Zithro Azithromycin Tablets

  • Broad-Spectrum Activity: Targets gram-positive and gram-negative pathogens including Vibrio, Aeromonas, and Mycobacterium.
  • Internal & External Coverage: Treats infections like ulcers, skin lesions, fin rot, septicemia, and bacterial gill disease.
  • Long-Lasting Effectiveness: Prolonged action minimizes the need for constant dosing—less stress for your fish.
  • Versatile Administration: Tablets dissolve easily in water or can be mixed into medicated food.
  • Tank-Friendly Formula: Minimal disruption to your biological filtration system.

Learn more about our aquatic care approach on the About Us page.

How to Use Fish Zithro Tablets

  • Dosage: Dissolve one 250mg tablet per 10 gallons of water in a separate treatment tank.
  • Duration: Treat daily for 5–7 days or as directed by a veterinarian.
  • Water Maintenance: Perform partial water changes between treatments to maintain optimal tank conditions.
  • Pro Tip: Quarantine sick fish separately to protect tank mates and stabilize water quality.

Ingredients

Active Ingredient: Azithromycin 250mg – Macrolide antibiotic that inhibits bacterial protein synthesis.

Inactive Ingredients: High-quality excipients for effective dissolution and tablet stability.

Possible Side Effects

  • Risk of antibiotic resistance with prolonged or repeated use
  • Mild stress or lethargy in some fish when improperly dosed

Important Warnings

  • For ornamental aquarium use only – not for human or food fish consumption
  • Monitor water quality parameters throughout treatment
  • Store in a cool, dry place away from sunlight
  • Keep tablets out of reach of children and pets

See our Shipping Policy for delivery details or review our Refund Policy for return and exchange information.

FAQs – Fish Zithro Azithromycin 250mg Tablets

  • What does Fish Zithro treat?
    Used for fin rot, gill disease, columnaris, ulcers, and septicemia in both freshwater and saltwater fish.
  • How do I know my fish needs Fish Zithro?
    Watch for symptoms like open sores, frayed fins, abnormal swimming, or redness. Confirm with a veterinarian when possible.
  • Can I use Fish Zithro in a community tank?
    It's safer to isolate infected fish in a hospital tank to prevent disruption to healthy tank mates and beneficial bacteria.
  • Will this treat fungus?
    No. Fish Zithro is an antibiotic and does not treat fungal infections. Use antifungal meds like Fluconazole for fungal issues.
  • How does Azithromycin work?
    It blocks bacterial protein production, stopping bacterial growth and allowing the immune system to recover the fish.
  • What if I overdose the tank?
    Overdosing can harm fish and destroy biological filtration. Follow instructions closely and consult a vet when unsure.
  • Can Fish Zithro be used with other antibiotics?
    Only if approved by an aquatic vet. Mixing antibiotics without guidance can cause harmful interactions.
  • How should I dispose of unused tablets?
    Follow local pharmaceutical disposal regulations. Do not flush or discard into aquariums or drains.
  • How long can I store Fish Zithro?
    Keep tablets in original packaging away from moisture and heat. Do not use past the expiration date.

Want to buy fish antibiotics online without a vet prescription? Visit DogsAntibiotics.com for fast shipping, expert products, and reliable treatment options for aquarium health.

Your order of 100$ or more gets free standard delivery.

  • Standard delivered 4-5 Business Days
  • Express delivered 2-4 Business Days

Orders are processed and delivered Monday-Friday (excluding public holidays)


members enjoy free returns.

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