Fish Pen - Penicillin 500mg 60 Tablets
$89.99 $99.99
In Stock
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AS-10015-6
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Fish Pen - Penicillin 500mg (60 Tablets) | Broad-Spectrum Aquarium Antibiotic
High-Potency Treatment for Bacterial Infections in Aquarium Fish
Fish Pen - Penicillin 500mg (60 Tablets) is a trusted broad-spectrum fish antibiotic formulated to combat gram-positive bacterial infections such as fin rot, gill disease, septicemia, and popeye. Each tablet delivers 500 mg of penicillin, ensuring a powerful and consistent treatment. Designed for both freshwater and saltwater aquariums, this high-quality fish medication helps maintain fish health without harming the aquatic ecosystem.
Key Benefits
✔ Broad-Spectrum Antibiotic – Effectively treats fin rot, gill disease, popeye, and bacterial septicemia.
✔ High-Strength Formula – Each 500mg tablet ensures strong and effective bacterial infection control.
✔ Safe for Aquatic Use – Specially designed to eliminate infections while maintaining aquarium balance.
✔ Convenient Size – The 60-tablet pack is ideal for multiple treatments or medium-sized aquariums.
✔ Trusted Quality – Manufactured under strict quality standards to ensure purity and effectiveness.
Dosage Instructions
✔ Add 1 tablet (500 mg) per 20 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.
Ingredients
- Active Ingredient: Penicillin 500 mg per tablet.
Related Products
- Fish Pen Forte - Penicillin 500mg (30 Tablets)
- Fish Zole - Metronidazole 500mg (60 Tablets)
- Fish Mox Forte - Amoxicillin 500mg (100 Capsules)
- Fish Flox - Ciprofloxacin 500mg (60 Capsules)
- Fish Doxycycline - 100mg (60 Capsules)
Fish Penicillin – Treating “Mouth Fungus” (Columnaris) and Fin Rot

Usually ships within 1 business day to USA & CANADA
Shipping Options:
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More Shipping Info:
- Orders placed Monday-Friday before 2pm Central Time usually ship the same day.
- We ship to the USA And Canada only.



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