Thomas Labs Fish Flex & Flex Forte (Cephalexin/Keflex)

Fish Flex and Flex Forte (Cephalexin) are valuable tools for treating bacterial infections in aquarium fish, especially external infections. As part of our commitment to providing comprehensive fish care solutions, we offer both Fish Flex and Forte within our Thomas Labs Fish Antibiotics category. For a broader selection of fish health products, please also see our Fish Medication category. At Thomas Labs Pet, we strive to provide quality medications for a variety of fish health needs.

Cephalexin is a cephalosporin antibiotic, effective against many gram-positive and some gram-negative bacteria. It is often a good choice for treating external bacterial infections in fish, such as fin rot, tail rot, and body ulcers.

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

Fish Cephalexin contains a higher concentration of cephalexin per dose. This makes it suitable for treating more severe infections or larger fish. Fish Flex is suitable for milder infections and smaller fish.

Common Fish Diseases Treated with Cephalexin (Fish Flex/Forte):

  • Fin rot
  • Tail rot
  • Mouth rot
  • Body ulcers
  • Skin infections

Why Choose Flex & Forte (Cephalexin) from Thomas Labs Pet?

  • Effective Treatment: Cephalexin is a proven treatment for many external bacterial fish infections.
  • Two Strengths Available: Choose the appropriate strength for your fish’s needs.
  • Quality Products: We source our fish medications from trusted manufacturers.
  • Convenient Options: We offer convenient online purchasing.
  • Fast Shipping: Get the medications your fish need quickly.

How to Use Fish Flex & Forte (Cephalexin):

  • Dosage: Follow the instructions on the product label carefully. Dosage is based on the volume of water in your aquarium and the chosen product (Fish Flex or Flex Forte).
  • Water Changes: Perform a partial water change (25-50%) before starting treatment and between doses.
  • Treatment Duration: Complete the full course of treatment as recommended on the product label, even if symptoms improve.
  • Quarantine Tank: It is highly recommended to treat infected fish in a separate quarantine tank to avoid disrupting the biological filter in your main aquarium.

Important Considerations:

  • Accurate Diagnosis: Ensure the fish’s illness is indeed bacterial before using antibiotics. Cephalexin will not be effective against viral, fungal, or parasitic infections.
  • Monitor Water Parameters: Cephalexin can affect the beneficial bacteria in your filter. Monitor ammonia, nitrite, and nitrate levels closely during treatment.
  • Consult a Veterinarian: If you are unsure about the diagnosis or treatment, consult a qualified aquatic veterinarian.

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