Expiration Date: Fix Mox 500 – EXP: 8/2027 Fix Mox 250 – EXP: 5/2027 Fix Flex 500 – EXP: 6/2027 Fix Flex 250 – EXP: 4/2026 Fix Doxy 100 - 30 – EXP: 2/2026 Fix Doxy 100 - 60 – EXP: 6/2026 Fix Flox 500 – EXP: 4/2027 Fix Pen 500 – EXP: 6/2026 Fix Sulfa 960 – EXP: 12/2028 Fix Zithro 250 – EXP: 6/2027 Fix Zole 500 – EXP: 2/2027 Fix Zole 250 – EXP: 12/2026 Fix Cin 150 – EXP: 8/2026 Reef Flux 200mg – EXP: 2/2027 Expiration Date: Fix Mox 500 – EXP: 8/2027 Fix Mox 250 – EXP: 5/2027 Fix Flex 500 – EXP: 6/2027 Fix Flex 250 – EXP: 4/2026 Fix Doxy 100 - 30 – EXP: 2/2026 Fix Doxy 100 - 60 – EXP: 6/2026 Fix Flox 500 – EXP: 4/2027 Fix Pen 500 – EXP: 6/2026 Fix Sulfa 960 – EXP: 12/2028 Fix Zithro 250 – EXP: 6/2027 Fix Zole 500 – EXP: 2/2027 Fix Zole 250 – EXP: 12/2026 Fix Cin 150 – EXP: 8/2026 Reef Flux 200mg – EXP: 2/2027

Fish Cephalexin

Fish Cephalexin

Fish Cephalexin – 250mg & 500mg Antibiotics for Fish Infection Treatment

Treating gram-positive bacterial infections in your aquarium? Our Fish Cephalexin collection features both 250mg and 500mg capsules, trusted for managing gill disease, skin ulcers, columnaris, and systemic bacterial infections in both freshwater and marine fish. Also known by trade names like Fish Flex and Fish Flex Forte, Cephalexin is one of the most effective and widely used fish antibiotics on the market.

At FishAntibiotics.us, we offer aquarium-grade Fish Cephalexin with fast U.S. shipping and no prescription required. Whether you need Fish Flex 250mg for a smaller tank or Fish Cephalexin 500mg for heavy-duty infections, we’ve got your aquatic health covered.

Why Use Fish Cephalexin?

  • ✅ Broad-spectrum coverage for gram-positive bacteria
  • ✅ Excellent for external wounds, ulcers, skin and fin infections
  • ✅ Easy to dose, effective in both freshwater and saltwater systems
  • ✅ Sold under trusted names like Fish Flex, Fishbiotic Cephalexin, and Aqua-Ceph

Available Strengths

  • Fish Cephalexin 250mg Capsules – Common dose for moderate tank infections
  • Fish Cephalexin 500mg Capsules – For larger tanks and persistent infections

FAQs – Fish Cephalexin (Fish Flex)

What does Fish Cephalexin treat?

It is used for gram-positive bacterial infections including gill disease, fin rot, body ulcers, and red streaking in aquarium fish.

What is the difference between Fish Flex and Fish Cephalexin?

Fish Flex is a brand name. The active ingredient is Cephalexin, a first-generation cephalosporin antibiotic.

Is Fish Cephalexin safe for all fish?

Yes, when dosed properly. Always isolate sick fish when possible and follow aquatic dosing guidelines.

Do I need a prescription to buy Cephalexin for fish?

No. FishAntibiotics.us ships directly to customers in the U.S. without requiring a prescription.

Can Fish Cephalexin be used in saltwater aquariums?

Yes. Cephalexin is safe for both saltwater and freshwater systems when dosed appropriately.

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Shop Fish Cephalexin today and restore the health of your fish with trusted aquarium antibiotics.

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