Skip to product information
1 of 4

Thomas Pets

Thomas Labs Fish Flex - Cephalexin/Keflex 250 mg Capsules (100 Count) - 2 Pack

Thomas Labs Fish Flex - Cephalexin/Keflex 250 mg Capsules (100 Count) - 2 Pack

Regular price $119.99 USD
Regular price $139.99 USD Sale price $119.99 USD
Sale Sold out
Brand

Thomas Labs Fish Flex 250 mg 2 Pack – Cephalexin Antibiotic for Aquarium Fish

Cephalexin/Keflex 250 mg Capsules (100 Count) - 2 Pack

Fish Flex (Cephalexin) 250mg by Thomas Labs is a broad-spectrum fish antibiotic designed to treat bacterial infections in both freshwater and saltwater aquariums. This 2-pack bundle provides ample supply for long-term treatment and multiple aquariums.

For more fish antibiotics, visit our collection.


Key Benefits of Fish Flex (Cephalexin) 250mg

Broad-Spectrum Antibiotic – Effectively treats bacterial infections in fish.
Treats Fin Rot & Ulcers – Ideal for fin rot, tail rot, and other gram-positive bacterial infections.
Bulk 2-Pack Bundle – Convenient supply for large aquariums or multiple treatments.
Safe for Freshwater & Saltwater Fish – Designed for aquarium fish without harming beneficial bacteria.
Trusted Manufacturer – Made by Thomas Labs, a leader in fish antibiotics.


How to Use Fish Flex (Cephalexin) 250mg

Dosage Instructions

  • Add 1 capsule (250mg) per 10 gallons of water.
  • Repeat every 24 hours for 5-10 days, depending on the severity of the infection.
  • Complete the full treatment course, even if symptoms improve.

Important Usage Guidelines

Remove Activated Carbon Filters – Filters may absorb the medication, reducing effectiveness.
Perform Water Changes20-25% water change is recommended between doses.
Use in a Quarantine Tank – Helps prevent disruption to biological filtration in the main aquarium.


Common Fish Diseases Treated with Fish Flex (Cephalexin) 250mg

  • Fin Rot – Bacterial infection leading to frayed, decaying fins.
  • Tail RotTissue loss in the tail due to bacterial infection.
  • Gill Disease – Bacterial infection affecting fish breathing.
  • Skin UlcersOpen sores caused by bacterial infections.

For more fish antibiotics, visit our Fish Antibiotics Collection.


Related Products

Fish Flex Forte - Cephalexin 500mg (100 Capsules)
Fish Mox - Amoxicillin 250mg (100 Capsules)
Fish Mox Forte - Amoxicillin 500mg (200 Capsules)
Fish Zole Forte - Metronidazole 500mg (60 Tablets)
Fish Sulfa Forte - Sulfamethoxazole 800mg, Trimethoprim 160mg (30 Tablets)


Tags

fish antibiotics, Cephalexin, Fish Flex, Fish Antibiotics, Bacterial Infections, Thomas Labs, Aquarium Medication, Cephalexin 250mg.

View full details

YOU MAY ALSO LIKE