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Fish Flex 250mg 100 Capsules

$59.99 $69.99

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Type:

AS-004-AF

Category:

Fish Flex (Cephalexin) 250mg – 100 Capsules

Reliable Antibiotic Treatment for Ornamental Fish

Fish Flex Cephalexin 250mg offers a powerful and proven solution to treat bacterial infections in aquarium fish. Formulated with Cephalexin Monohydrate, a trusted broad-spectrum antibiotic, these capsules are ideal for managing fin rot, gill disease, and skin ulcers. Fish Flex dissolves easily and acts quickly—restoring health and stability to your aquatic environment.

Discover more options in our Fish Antibiotics Collection.

Key Benefits of Fish Flex 250mg Capsules

  • Broad-Spectrum Action: Targets a wide variety of harmful bacteria, both gram-positive and gram-negative.
  • Quick Recovery Support: Aids in healing ulcers, tail rot, and other visible signs of bacterial stress.
  • Safe for Aquatic Life: Formulated to protect ornamental fish and minimize impact on beneficial bacteria.
  • Flexible Usage: Use in water or mixed with food for internal infections.

Want to know why fishkeepers trust us? Visit our About Us page.

How to Use Fish Flex 250mg Capsules

  • Water Method: Dissolve the appropriate number of capsules into tank water based on volume and severity of infection.
  • Food Method: Open capsule and mix powder into moist fish food for internal dosing.
  • Duration: Continue treatment once daily for 5–7 days, or as directed by an aquatic veterinarian.

Ingredients

Active Ingredient: Cephalexin Monohydrate 250mg – A broad-spectrum, fast-acting antibiotic.

Other Ingredients: Gelatin capsule with safe excipients for storage and stability.

Precautions & Safety

  • Do not use on fish intended for human consumption.
  • Overuse may harm the aquarium's microbial balance—use exactly as recommended.
  • Store capsules in a cool, dry area between 59°F–86°F (15°C–30°C), away from sunlight or humidity.
  • Keep out of reach of children and pets.

View our Shipping Policy for delivery options and our Refund Policy for returns.

FAQs – Fish Flex Cephalexin 250mg 100 Capsules

  • What makes Fish Flex 250mg effective?
    It uses Cephalexin Monohydrate, a trusted antibiotic for combating fish bacterial infections while preserving the tank’s ecosystem.
  • Is it effective for internal infections?
    Yes. Use the food method to treat internal bacterial issues like ulcers and body inflammation.
  • Is Fish Flex better than other fish antibiotics?
    Its ease of use, broad-spectrum coverage, and safety for most fish species make it a top choice among aquarists.
  • Is it safe for sensitive fish?
    Yes, when dosed properly and with water quality monitored, Fish Flex is safe for sensitive ornamental species.
  • Can I use it alongside other treatments?
    Only under professional supervision. Some combinations may reduce efficacy or harm fish.
  • Does Fish Flex treat fungus?
    No. It is a bacterial antibiotic. For fungal infections, use dedicated antifungal products such as Fluconazole.
  • What should I do after completing treatment?
    Wait 24–48 hours, then perform a partial water change to remove residual medication and stabilize your tank.
  • Is it safe for shrimp and snails?
    May be harmful to invertebrates. Use a separate treatment tank if your main tank contains them.
  • How do I know if it's working?
    Improved color, increased energy, healed fins, and reduced swelling are all signs of recovery.
  • How do I dispose of unused capsules?
    Follow local pharmaceutical waste guidelines. Never flush or discard in water systems.

Looking to buy fish antibiotics online without a vet prescription? Trust DogsAntibiotics.com for safe, effective treatments delivered fast across the U.S.

Your order of 100$ 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)


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