Fish Pen – Pen 500mg 30 Tablets
Regular price $59.99
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Fish Pen – Pen 500mg 30 Tablets | FixMox
Trusted Gram-Positive Fish Antibiotic – Reliable and Time-Tested
Fix Pen 500mg offers a reliable solution for treating gram-positive bacterial infections in aquarium fish. Each tablet contains 500mg of Pen, a classic and effective fish antibiotic with a proven history in aquatic care. Explore more trusted medications like Fix Pen at FixMox.
Key Benefits:
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Proven Treatment: Pen is one of the oldest and most trusted antibiotics used in fish medicine.
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Targets Gram-Positive Bacteria: Effective against common pathogens like those causing fin rot and skin infections.
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Easy to Administer: Tablets can be given directly, crushed into food, or dissolved in water.
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Safe & Effective: A dependable treatment option when used as directed.
Instructions for Use
Purpose: Fix Pen is used to treat various bacterial infections in ornamental and aquarium fish, including mouth rot, skin lesions, and fin rot.
Cautions:
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Not for human consumption.
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Keep out of reach of children.
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May harm invertebrates and sensitive aquatic plants.
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Remove carbon filtration during treatment.
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Consult an expert before use in reef aquariums or breeding tanks.
Dosage Guidelines:
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Standard Dose: Use one tablet (500mg) per 20 gallons of aquarium water.
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Repeat: Dose every 24 hours.
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Duration: Continue treatment for 5–10 days. Discontinue if no improvement after 5 days.
Consult an aquatic expert to tailor treatment for your fish species and tank setup.
How to Use:
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Direct Administration: Place tablet directly in the fish’s mouth if possible.
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Food Mixing: Crush tablet and mix with food to ensure full consumption.
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Water Dissolution: Dissolve crushed tablet into aquarium water as advised.
Ingredients:
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Active Ingredient: Pen – 500mg per tablet.
Important Notices:
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Water Changes: Conduct partial water changes between each dose.
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Monitoring: Observe fish closely for negative reactions.
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Discontinue: Stop treatment if symptoms worsen or persist beyond 5 days.
Storage Recommendations:
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Store in a cool, dry, dark place.
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Keep away from moisture and heat.
Frequently Asked Questions
Q: What infections is Fix Pen best for?
A: Fix Pen treats gram-positive bacterial infections such as fin rot, mouth rot, infected eyes, and skin ulcers.
Q: Can I use Fix Pen with other medications?
A: Always consult a vet before combining medications. Some may interact with Pen and reduce effectiveness.
Q: Is it safe for breeding tanks?
A: Use caution—antibiotics may interfere with fry or egg development. Only treat when absolutely necessary under expert guidance.
Q: Where can I learn more about fish antibiotic treatments?
A: Visit FixMox for more details on fish antibiotics, dosage, and care.
Your order of 50$ or more gets free standard delivery.
- Standard delivered 4-5 Business Days
- Express delivered 2-4 Business Days
Orders are processed and delivered Monday-Friday (excluding public holidays)
members enjoy free returns.



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