Thomas Pets

Thomas labs Fish Pen - Penicillin 500 mg 60 Tablets

$89.99 USD

~~$99.99 USD~~ $89.99 USD

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Brand Aqua Lab Thomas lab

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Thomas Labs Fish Pen - Penicillin 500mg 60 Tablets

Powerful Gram-Positive Antibiotic for Aquarium Fish

Fish Pen (Penicillin) 500mg – 60 Tablets is a targeted antibiotic designed to treat bacterial infections in freshwater and saltwater fish. Penicillin is a gram-positive antibiotic that effectively combats fin rot, tail rot, and other bacterial infections caused by susceptible bacteria.

Manufactured by Thomas Labs, this trusted fish antibiotic is essential for maintaining a healthy aquarium environment.

Common Fish Diseases Treated with Fish Pen

🔹 Fin Rot
🔹 Tail Rot
🔹 Bacterial Ulcers
🔹 Skin and Gill Infections
🔹 Mouth Rot

If other broad-spectrum antibiotics like Fish Mox (Amoxicillin) or Fish Flox (Ciprofloxacin) haven’t worked, Fish Pen may be the best alternative for gram-positive infections.

Why Choose Fish Pen (Penicillin) from Thomas Labs?

✅ Highly Effective Against Gram-Positive Bacteria
✅ 500mg Per Tablet for Powerful Treatment
✅ Trusted Manufacturer - Thomas Labs
✅ Safe for Freshwater & Saltwater Fish
✅ Fast-Acting Formula

Instructions for Use

Dosage Guidelines

✔ Add 1 tablet (500mg) per 20 gallons of water.
✔ Repeat every 24 hours for 5–10 days, depending on the severity of the infection.

Treatment Process

⚠ Remove Activated Carbon Filters before starting treatment.
⚠ Perform 25-50% water changes before each new dose.
⚠ Continue the full course of treatment, even if symptoms improve.

For best results, treat fish in a quarantine tank to avoid disrupting your main aquarium’s biological balance.

Important Considerations

⚠ Accurate Diagnosis: Ensure the infection is bacterial before using Fish Pen.
⚠ Monitor Water Parameters: Penicillin may affect beneficial bacteria in your aquarium.
⚠ Consult an Aquatic Veterinarian for precise treatment recommendations.