FAQ – Frequently Asked Questions About Fish Antibiotics

Everything You Need to Know Before You Buy Aquarium Antibiotics

At FishMox.us, we’re committed to providing clear, trusted answers to help you confidently use fish antibiotics without vet prescriptions. This FAQ collection covers essential questions about ordering, usage, shipping, safety, and more — whether you’re treating freshwater or marine fish.

Top Questions Answered

What are fish antibiotics used for?

Fish antibiotics are used to treat a variety of aquarium infections including fin rot, columnaris, gill disease, and internal bacterial conditions. Popular medications include fish amoxicillin, fish doxycycline, fish cephalexin, and fish ciprofloxacin.

Do I need a prescription to buy fish antibiotics?

No. All our antibiotics — including Fish Mox, Fish Flex, and Fish Doxy — are available without a veterinary prescription and labeled for aquarium use only.

Are fish antibiotics safe for all species?

Yes, when dosed correctly. Always follow aquarium-specific guidelines and isolate sick fish when possible. Most medications are safe for both freshwater and saltwater tanks.

What if I’m unsure which antibiotic to use?

We recommend checking our Fish Antibiotics Collection or contacting our support team for guidance based on your fish’s symptoms.

What’s the difference between Fish Mox and Fish Mox Forte?

Fish Mox contains 250mg of fish amoxicillin, while Fish Mox Forte contains 500mg. Choose the correct dosage based on tank size and infection severity.

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Contact Us If You Still Have Questions

Our team is available Monday to Friday to help you with product advice, order support, or choosing the right fish antibiotic.