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Fish Doxy Doxycycline 100mg 30 Count

$79.99 $89.99

In Stock

  • FREE 2-5 day shipping over $49

Fish Doxy (Doxycycline) 100mg – 30 Capsules | Broad-Spectrum Fish Antibiotic

Fish Doxy 100mg Capsules provide a reliable and fast-acting solution for treating bacterial infections in freshwater and saltwater fish. Powered by doxycycline hyclate, this broad-spectrum antibiotic targets gram-positive and gram-negative bacteria, effectively addressing conditions such as fin rot, tail rot, columnaris, and septicemia.

An essential treatment for ornamental and aquarium fish, Fish Doxy supports quick recovery while protecting your aquatic environment.


Key Benefits of Fish Doxy 100mg

  • Broad-spectrum antibiotic: Fights a wide range of gram-positive and gram-negative bacterial infections.

  • Effective disease control: Treats fin rot, ulcers, septicemia, tail rot, and other common aquatic infections.

  • Safe for aquarium use: Suitable for both freshwater and marine species when administered as directed.

  • Fast absorption: Capsules dissolve quickly in water for efficient delivery and treatment.

  • Ideal for quarantine tanks: Helps isolate and treat infected fish without harming your main tank’s biofilter.

View the complete Fish Doxy product line for more treatment options.


How to Use Fish Doxy Capsules

  • Dosage: Use 1 capsule per 10 gallons of water. Treat once daily.

  • Duration: Continue treatment for 5 to 10 days, depending on infection severity.

  • Application: Administer in a hospital or quarantine tank filled with clean, dechlorinated water.

  • Post-treatment: Perform a water change and use activated carbon to remove residual medication.


Active Ingredients

  • Doxycycline Hyclate: 100 mg per capsule

  • Other Ingredients: Pharmaceutical-grade excipients for capsule stability and solubility


Warnings and Precautions

  • Do not use in tanks containing invertebrates (shrimp, snails, etc.)

  • Do not mix with other medications unless advised by an aquatic veterinarian

  • Store in a cool, dry place, away from direct sunlight

  • Keep out of reach of children and pets

  • Dispose of treated water responsibly to avoid environmental contamination


FAQs - Fish Doxy Doxycycline 100mg – 30 Capsules

What does Fish Doxy treat?
Fish Doxy treats bacterial infections such as fin rot, tail rot, columnaris, and septicemia.

Can it be used in saltwater tanks?
Yes, it is safe for both freshwater and saltwater environments.

Will Fish Doxy affect beneficial bacteria?
Yes, it may reduce beneficial bacteria. Use a hospital tank when possible.

Can I use it in breeding tanks?
Avoid use in breeding tanks unless necessary, as it may stress the fish and impact fry.

How do I dispose of treated water?
Do not release medicated water into natural bodies. Follow local disposal regulations.


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Shipping and Returns

We provide Ground, Express, Priority, and International shipping options based on delivery needs.

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 Doxy 100mg 30 CapsulesAquarium Antibiotic Doxycycline 100mgFish Doxy Bacterial Infection Treatment