Thomas Labs Fish Pen & Fish Pen Forte (Penicillin)

Fish Pen and Pen Forte (Penicillin) are valuable tools for treating bacterial infections in aquarium fish, specifically those caused by gram-positive bacteria. As part of our commitment to providing comprehensive fish care solutions, we offer both Fish Pen and Pen Forte within our Thomas Labs Fish Antibiotics category. For a broader selection of fish health products, please also see our Fish Medication category. At Thomas Labs Pet, we strive to provide quality medications for a variety of fish health needs.

Penicillin is an antibiotic primarily effective against gram-positive bacteria. This makes it a useful choice for treating specific bacterial infections in aquarium fish. It’s important to note that it has a narrower spectrum of activity compared to some other antibiotics.

What’s the difference between Fish Pen and Pen Forte?

Penicillin Forte contains a higher concentration of penicillin per dose. This makes it suitable for treating more severe infections or larger fish. Fish Penicillin is suitable for milder infections and smaller fish.

Common Fish Diseases Treated with Penicillin :

• Some forms of fin rot and tail rot (when caused by gram-positive bacteria)
• Certain skin ulcers and lesions
• Other infections caused by susceptible gram-positive bacteria

Why Choose Fish Penicillin from Thomas Labs Pet?

• Targeted Treatment: Penicillin is effective against specific types of bacterial infections (gram-positive).
• Two Strengths Available: Choose the appropriate strength for your fish’s needs.
• Quality Products: We source our fish medications from trusted manufacturers.
• Convenient Options: We offer convenient online purchasing.
• Fast Shipping: Get the medications your fish need quickly.

How to Use Fish Pen & Forte (Penicillin):

• Dosage: Follow the instructions on the product label carefully. Dosage is based on the volume of water in your aquarium and the chosen product (Fish Pen or Fish Pen Forte).
• Water Changes: Perform a partial water change (25-50%) before starting treatment and between doses.
• Treatment Duration: Complete the full course of treatment as recommended on the product label, even if symptoms improve.
• Quarantine Tank: It is highly recommended to treat infected fish in a separate quarantine tank to avoid disrupting the biological filter in your main aquarium.

Important Considerations:

• Accurate Diagnosis: Ensure the fish’s illness is indeed caused by gram-positive bacteria before using penicillin. It will not be effective against gram-negative bacteria, viral, or parasitic infections.
• Monitor Water Parameters: Penicillin can affect the beneficial bacteria in your filter. Monitor ammonia, nitrite, and nitrate levels closely during treatment.
• Consult a Veterinarian: If you are unsure about the diagnosis or treatment, consult a qualified aquatic veterinarian.

Related Products :

• Fish Mox (Amoxicillin): A broad-spectrum antibiotic effective against a wider range of bacteria (including some gram-negative).
• Fish Flex (Cephalexin): Another option for treating bacterial infections, also more effective against gram-positive bacteria.
• Explore our full range of Fish Antibiotics for more treatment options.
• Browse our Fish Medication category for other treatments for various fish ailments.