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 Penicillin 250mg – Trusted Antibiotic for Fin Rot & Gill Disease

Regular price $59.99

In Stock

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Check The Latest Expiration Dates

Wondering if your fish antibiotics are still safe and potent? Welcome to the official FishAntibiotics.us expiration date tracker—the most accurate and up-to-date source for ensuring you receive the freshest fish meds online.

Whether you're purchasing trusted Fish Mox (Amoxicillin), powerful Fish Zole (Metronidazole), or broad-spectrum solutions like Fish Flex (Cephalexin) or Fish Sulfa (Sulfamethoxazole/Trimethoprim), we keep you informed. Updated regularly, this guide helps you compare your product with the latest batch from FishAntibiotics.us.

We specialize in only the most reliable, pharmaceutical-grade aquarium antibiotics, including ciprofloxacin, azithromycin, clindamycin, and fluconazole. Buy with confidence, knowing your medication hasn’t passed its prime.

FishAntibiotics.us Product Expiration Dates

Fish Mox – Amoxicillin 500mg 100 Capsules – Expires: 08/2027
Fish Mox – Amoxicillin 250mg 100 Capsules – Expires: 05/2027
Fish Doxy – Doxycycline 100mg 30 Capsules – Expires: 02/2026
Fish Doxy – Doxycycline 100mg 60 Capsules – Expires: 06/2026
Fish Sulfa – Sulfamethoxazole & Trimethoprim 960mg 60 Tablets – Expires: 12/2028
Fish Sulfa – Sulfamethoxazole & Trimethoprim 960mg 30 Tablets – Expires: 12/2028
Fish Pen – Penicillin 500mg 30 Tablets – Expires: 06/2026
Fish Pen – Penicillin 500mg 60 Tablets – Expires: 06/2026
Fish Flox – Ciprofloxacin 500mg 30 Capsules – Expires: 04/2027
Fish Flox – Ciprofloxacin 500mg 60 Capsules – Expires: 04/2027
Fish Flex – Cephalexin 250mg 100 Capsules – Expires: 04/2026
Fish Flex – Cephalexin 500mg 100 Capsules – Expires: 06/2027
Fish Zole – Metronidazole 250mg 60 Tablets – Expires: 12/2026
Fish Zole – Metronidazole 500mg 60 Tablets – Expires: 02/2027
Fish Zithro – Azithromycin 250mg 30 Tablets – Expires: 06/2027
Fish Cin – Clindamycin 150mg 100 Capsules – Expires: 08/2026
Reef Flux – Fluconazole 200mg 10 Capsules – Expires: 02/2027

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Fish Penicillin 250mg 100 Tablets

Trusted Treatment for Bacterial Fish Infections

Fish Penicillin provides a safe and effective treatment for a range of bacterial diseases affecting aquarium fish. Ideal for fin rot, tail rot, and gill infections, this formula delivers consistent results to keep your fish thriving.

Benefits

Effective against gram-positive bacterial infections
Safe for freshwater and saltwater aquariums
High purity 250mg tablets for accurate dosing
Supports fast recovery and healthy regrowth

Usage Instructions

Use one tablet (250mg) per 40 gallons of aquarium water. Repeat every 24 hours for 5–10 days, changing 25% of the water daily. Stop use if no improvement is seen after 5 days.