Fish Mox (Amoxicillin) 500 mg 100 Capsules
$49.99 $69.99
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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?
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Broad-Spectrum Protection: Effectively targets both gram-positive and gram-negative bacteria.
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Fast-Acting Formula: Dissolves rapidly in aquarium water for efficient absorption and faster recovery.
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Safe for Aquatic Life: Specifically formulated for use in ornamental fish; will not harm your aquarium environment when used correctly.
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Effective for Multiple Conditions: Treats external and internal infections including dropsy, open sores, and bacterial gill disease.
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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:
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Active Ingredient: Amoxicillin 500mg per capsule
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Quantity: 100 capsules per bottle
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Treatment Coverage: One capsule per 20 gallons of water
Dosage & Directions:
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Dosage: Use 1 capsule (500mg) per 20 gallons of aquarium water.
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Frequency: Dose once every 24 hours.
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Duration: Continue treatment for 5–10 days.
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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:
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Red streaks in fins or tail
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Open sores or body ulcers
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Bulging eyes (exophthalmia)
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Swollen abdomen (dropsy)
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Lethargy or rapid breathing
Warnings & Storage:
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Not for human use. Not intended for fish meant for human consumption.
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Store in a cool, dry place (59°–86°F / 15°–30°C).
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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.


