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Fish Doxycycline 100mg 30 Count

$69.99 $79.99

In Stock

New regulations are coming, and our fish medications will be unavailable soon. Stock up now—limited supply!

Check The Latest Expiration Dates

Updated 05/21/2025

Looking for the freshest and most reliable fish antibiotics online? Whether you're stocking up on Fish Mox, Fish Flex, Fish Zole, or Fish Sulfa, knowing the expiration dates is essential for ensuring the effectiveness of your aquarium medication. We've created this regularly updated expiration list so you can shop confidently. Don't risk outdated meds—compare your current product with the latest fish antibiotics expiration dates from trusted sources like Thomas Labs Pets.

From broad-spectrum fish antibiotics like amoxicillin, ciprofloxacin, and doxycycline, to advanced treatments like fluconazole and metronidazole, we’ve got you covered. Make sure your fish meds are safe, current, and fully potent with the latest updates below.

Fish Antibiotics Expiration Dates

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

SKU: AS-008-AF

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Product Description
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Fish Doxycycline - 100mg (30 Count) | Aquarium Antibiotic

Broad-Spectrum Antibiotic for Bacterial Infections in Fish

Fish Doxy - 100mg (30 Capsules) is a trusted broad-spectrum fish antibiotic formulated to combat bacterial infections such as fin rot, columnaris, popeye, and gill disease. Each capsule contains 100 mg, a reliable antibiotic that targets gram-positive and gram-negative bacteria. Safe for freshwater and saltwater aquariums, this medication is essential for maintaining fish health and a balanced aquatic environment.

Shop More Fish Antibiotics

Key Benefits

✔ Broad-Spectrum Treatment – Effectively combats fin rot, tail rot, columnaris, popeye, and gill disease.
✔ Potent Formula – Each 100mg capsule provides consistent and reliable bacterial infection treatment.
✔ Safe for Aquatic Use – Specially formulated to preserve aquarium ecosystem balance.
✔ Compact 30-Capsule Pack – Ideal for small aquariums or single treatment courses.
✔ Trusted Quality – Manufactured under strict standards to ensure purity and effectiveness.

Dosage Instructions

✔ Add 1 capsule (100 mg) per 10 gallons of aquarium water.
✔ Repeat every 24 hours for 5-10 days, depending on infection severity.

Usage Tips & Cautions

✔ Remove activated carbon filters during treatment for maximum effectiveness.
✔ Perform 20-25% water changes between doses to maintain water quality.
✔ Not for human use.