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Fish Mox (Amoxicillin) 500 mg 100 Capsules

$49.99 $69.99

In Stock

  • FREE 2-5 day shipping over $49

Fish Mox (Amoxicillin) 500mg – 100 Capsules | Premium Fish Antibiotics

Fish Mox (Amoxicillin) 500mg Capsules are a trusted, high-potency fish antibiotic designed to fight a wide range of bacterial infections in both freshwater and saltwater ornamental fish. These pharmaceutical-grade capsules contain amoxicillin, a powerful antibiotic used to treat conditions like fin rot, gill disease, ulcers, and internal infections, helping your fish recover quickly and safely.

Why Choose Fish Mox Amoxicillin 500mg?

  • Broad-Spectrum Protection: Effectively targets both gram-positive and gram-negative bacteria.

  • Fast-Acting Formula: Dissolves rapidly in aquarium water for efficient absorption and faster recovery.

  • Safe for Aquatic Life: Specifically formulated for use in ornamental fish; will not harm your aquarium environment when used correctly.

  • Effective for Multiple Conditions: Treats external and internal infections including dropsy, open sores, and bacterial gill disease.

  • High-Quality USA Product: Manufactured under strict guidelines to ensure purity and reliability.

Shop our full Fish Mox collection here for related treatments and bundle options.


Product Specifications:

  • Active Ingredient: Amoxicillin 500mg per capsule

  • Quantity: 100 capsules per bottle

  • Treatment Coverage: One capsule per 20 gallons of water


Dosage & Directions:

  1. Dosage: Use 1 capsule (500mg) per 20 gallons of aquarium water.

  2. Frequency: Dose once every 24 hours.

  3. Duration: Continue treatment for 5–10 days.

  4. Water Maintenance: Perform a 25% water change before dosing; remove activated carbon from filters.

After treatment, restore beneficial bacteria with probiotics and monitor water parameters.


Symptoms Fish Mox Can Help With:

  • Red streaks in fins or tail

  • Open sores or body ulcers

  • Bulging eyes (exophthalmia)

  • Swollen abdomen (dropsy)

  • Lethargy or rapid breathing


Warnings & Storage:

  • Not for human use. Not intended for fish meant for human consumption.

  • Store in a cool, dry place (59°–86°F / 15°–30°C).

  • Keep out of reach of children and pets.


FAQs – Fish Mox Amoxicillin for Fish

Q: Can I use Fish Mox in a saltwater tank?
A: Yes, Fish Mox is suitable for both freshwater and saltwater aquariums.

Q: Will this harm beneficial bacteria?
A: It may impact your biofilter. Replenish beneficial bacteria after treatment.

Q: Is Fish Mox safe for fry or young fish?
A: Use with caution and reduce dosage based on tank size. Monitor closely.

Q: Can I mix Fish Mox with other medications?
A: Avoid combining unless instructed by an aquatic veterinarian.

Q: What if symptoms persist after 5 days?
A: Discontinue use and consult a vet. The infection may require alternate treatment.


Related Antibiotics for Fish Health:


Shipping & Returns

We offer priority, express, and international shipping options. Please review our Shipping Policy and Refund Policy for full details.

Your order of 49$ 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.

Fish Mox 500mg Antibiotic CapsulesAmoxicillin for Aquarium Fish InfectionsFish Mox 100 Count Broad-Spectrum Treatment