Thomas Labs Fish Pen Forte - Aquarium Penicillin 500mg 60 Tablets

Thomas Labs Fish Pen Forte - Aquarium Penicillin 500mg (60 Tablets)

Fish Pen Forte (Penicillin) 500mg by Thomas Labs is a high-potency fish antibiotic designed to treat gram-positive bacterial infections in freshwater and saltwater aquariums. This stronger formulation is ideal for severe infections that require a higher dose of Penicillin.

For more fish antibiotics, check out our full collection.

Key Benefits of Fish Pen Forte (Penicillin) 500mg

✅ High-Potency Antibiotic – Effectively treats bacterial infections in fish.
✅ Targeted Treatment – Ideal for fin rot, tail rot, and gram-positive infections.
✅ Safe for Freshwater & Saltwater Fish – Designed for aquarium fish without harming beneficial bacteria.
✅ Trusted Manufacturer – Made by Thomas Labs, a leader in fish antibiotics.
✅ Fast-Acting Formula – Works quickly to eliminate harmful bacteria in the aquarium.

How to Use Fish Pen Forte (Penicillin) 500mg

Dosage Instructions

• Add 1 tablet (500mg) per 20 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 Changes – 20-25% 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 Pen Forte (Penicillin) 500mg

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

For more fish antibiotics, visit our Fish Antibiotics Collection.

Related Products

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✔ Fish Zole Forte - Metronidazole 500mg (60 Tablets)
✔ Fish Sulfa Forte - Sulfamethoxazole 800mg, Trimethoprim 160mg (30 Tablets)

Tags

fish antibiotics, Penicillin, Fish Pen, Fish Antibiotics, Bacterial Infections, Thomas Labs, Aquarium Medication, Penicillin 500mg.