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Trusted Fish Antibiotics – Fast, Safe, No Prescription Needed

Shop pharmaceutical-grade Aqua-Mox, Fish Flex, Fish Flox & more. Long expiration dates, fast USA shipping, and guaranteed quality for healthy aquariums.

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20% OFF

Aqua Mox (Amoxicillin) 500mg – 100 Capsules

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Aqua Mox (Amoxicillin) 500mg – 100 Capsules

30% OFF

Aqua Zithro (Azithromycin) 250mg – 30 Tablets

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Aqua Zithro (Azithromycin) 250mg – 30 Tablets

25% OFF

Aqua Pen (Penicillin) 500mg – 100 Tablets

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Aqua Pen (Penicillin) 500mg – 100 Tablets

OUR PRODUCTS

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Pharmaceutical-Grade

All our fish antibiotics are USP-grade, the same trusted formulas used in veterinary medicine — made in the USA for maximum purity and safety.

Fast USA Shipping

We know timing matters. That’s why we ship quickly from the USA, so your fish treatments arrive on time when your aquarium needs them most.

Trusted by Aquarists

With years of proven reliability, our antibiotics are trusted across the USA by hobbyists and professionals alike — no vet prescription required.

FAQ

Do I need a prescription to buy Aqua Antibiotics like Aqua-Mox?

No prescription is required. All of our Aqua Antibiotics, including Aqua-Mox (Amoxicillin), Aqua-Flox (Ciprofloxacin), Aqua-Doxy (Doxycycline), and others, are available for purchase without a veterinarian’s prescription. They are formulated and packaged specifically for ornamental fish and aquarium use.

Which antibiotic is best for common fish infections (fin rot, columnaris, popeye, etc.)?

Answer: The best antibiotic depends on the type of infection:

  • Aqua-Mox (Amoxicillin): Effective for fin rot, gill disease, and general bacterial infections.
  • Aqua-Flox (Ciprofloxacin): Strong against internal infections and resistant strains.
  • Aqua-Doxy (Doxycycline): Useful for gill infections, tail rot, and systemic infections.
  • Aqua-Zole (Metronidazole): Targets parasites and anaerobic bacterial infections.
    Our FAQ page and product descriptions provide guidance to help you choose.
Are your fish antibiotics pharmaceutical grade and safe for aquariums?

Answer: Yes. All Aqua Antibiotics are pharmaceutical grade, sourced from trusted suppliers, and manufactured to meet strict quality standards. They are safe when used as directed for ornamental and aquarium fish. Each product comes in sealed bottles with long expiration dates for maximum effectiveness.

How should I store Aqua Antibiotics to keep them effective long-term?

Answer: Keep bottles tightly sealed and stored at controlled room temperature (59°–86°F / 15°–30°C). Store in a cool, dry place away from direct sunlight and moisture. Do not refrigerate or freeze. Proper storage ensures potency until the printed expiration date.

Can fish antibiotics be used in both freshwater and saltwater tanks?

Answer: Yes. Aqua Antibiotics are safe and effective for both freshwater and saltwater aquariums. Always follow the recommended dosage instructions, and ensure proper aeration and water changes during treatment.

What’s the correct dosage and duration when treating fish with Aqua Antibiotics?

Answer: Dosage varies by product, but a standard guideline is:

  • Add one capsule or tablet per recommended gallons of water (varies by antibiotic strength).
  • Repeat every 24 hours for 5–10 days, depending on the severity of the infection.
  • Always perform partial water changes between doses.
    For exact instructions, see each product’s Directions for Use section.