Thomas Labs Fish Pen Forte - Penicillin 500mg 30 Tablets

Thomas Labs Fish Pen Forte - Penicillin 500mg Tablets (30 Count)

High-Potency Antibiotic for Fish Health

Fish Pen Forte (Penicillin) 500mg Tablets from Thomas Labs are designed to combat gram-positive bacterial infections in aquarium fish. This broad-spectrum antibiotic effectively treats fin rot, ulcers, gill disease, and other bacterial infections in both freshwater and saltwater aquariums.

For more fish treatments, explore our full fish antibiotics collection.

Key Benefits of Fish Pen Forte (Penicillin) 500mg

✅ High-Potency Formula – Effective against severe bacterial infections.
✅ Broad-Spectrum Effectiveness – Targets tail rot, skin ulcers, and gill infections.
✅ Safe for Aquatic Use – Designed specifically for fish antibiotics.
✅ Fast-Acting & Reliable – Absorbs quickly to begin treatment immediately.
✅ Trusted Quality – Manufactured by Thomas Labs, a leader in fish antibiotics.

For more powerful antibiotics, check out our Fish Medication Collection.

Common Fish Diseases Treated with Penicillin (Fish Pen Forte)

• Fin Rot – A common bacterial infection leading to tissue damage.
• Tail Rot – Causes fin decay and body deterioration.
• Skin Ulcers & Lesions – Bacteria penetrate fish tissue, leading to open sores.
• Columnaris (Cotton Wool Disease) – Affects fish gills and skin, leading to fungus-like growths.
• Gill Disease – Causes breathing difficulty and lethargy.
• Aeromonas & Streptococcus Infections – Harmful bacteria found in aquarium environments.

Browse our full selection of fish antibiotics for more treatment options.

How to Use Fish Pen Forte (Penicillin) 500mg Tablets

Dosage & Administration

• Add 1 tablet (500mg) per 20 gallons of aquarium water.
• Repeat every 24 hours for 5-10 days, depending on infection severity.
• Remove activated carbon filters during treatment for maximum effectiveness.
• Perform 20-25% water changes between doses to maintain optimal water quality.

⚠ Important Notes:

• Not for human use – Intended for fish antibiotics only.
• Store in a cool, dry place.
• If symptoms persist, consult an aquatic veterinarian.

For detailed treatment guides, check our Fish Antibiotics Guide.

Related Products You May Like

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🔹 Fish Sulfa Forte – Sulfamethoxazole & Trimethoprim 800mg/160mg Tablets (30 Count)
🔹 Fish Flox – Ciprofloxacin 500mg Capsules (30 Count)

For more options, browse our full catalog of fish antibiotics.

Tags 

fish antibiotics, penicillin, bacterial infection treatment, fish medication, Thomas Labs, fish antibiotics treatment, fin rot treatment, aquarium antibiotics, fish disease prevention, best antibiotics for fish, fish health solutions