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Aqua Pen Penicillin – Fish Antibiotics bottle on a white background
  • Aqua Pen Penicillin – Fish Antibiotics bottle on a white background
  • Aqua Pen Penicillin – Fish Antibiotics bottle on a white background
Aqua Pen (penicillin) 500mg 100 Tablets – Fish Antibiotics
$89.95 $119.99

Aqua Pen ( penicillin) 500mg 100 Tablets – Fish Antibiotics

Trusted Protection for Aquarium Fish

Aqua Pen (Penicillin) Fish Antibiotics are a dependable treatment for bacterial infections in ornamental and aquarium fish. Formulated with Penicillin 500mg, this broad-spectrum antibiotic targets Gram-positive bacteria, helping to treat common conditions such as fin rot, columnaris, mouth rot, gill disease, and skin lesions.

Safe for use in both freshwater and saltwater aquariums, Aqua Pen dissolves quickly for even distribution, ensuring effective results and supporting the health and vitality of your fish.

Important Notice

This product is intended for fish use only. Not for human consumption. We do not sell or recommend this product for human use.

Key Benefits of Aqua Pen (Penicillin)

  • Broad-Spectrum Action: Effective against a wide range of Gram-positive bacterial infections.

  • Treats Common Fish Illnesses: Works against fin rot, mouth rot, skin lesions, and gill disease.

  • Easy to Use: Dissolves quickly in water and can also be administered with medicated feed.

  • Safe When Used Correctly: Relatively nontoxic for most freshwater and many marine species.

  • Supports Faster Recovery: Stops bacterial growth, reduces stress, and helps fish regain health quickly.

  • Prevents Infection Spread: Treats sick fish and reduces the risk of infection spreading to others.

Directions for Use

  • Dosage: Add one 500mg tablet per 20 gallons of water.

  • Frequency: Repeat treatment every 24 hours.

  • Duration: Continue for 5–10 days depending on infection severity.

  • Maintenance: Perform a partial water change between treatments.

  • If no improvement after 5 days: Discontinue treatment and seek veterinary advice.

Cautions

  • For aquarium use only – not for human use.

  • Do not use on fish intended for human consumption.

  • May affect beneficial bacteria in the tank – monitor water quality closely.

  • Remove invertebrates (shrimp, snails, corals) before treatment.

Storage

  • Store at room temperature (59°F–86°F / 15°C–30°C).

  • Keep tightly sealed in a cool, dry place away from light and moisture.

FAQs – Aqua Pen (Penicillin) Fish Antibiotics

What does Aqua Pen treat?
Aqua Pen is used for Gram-positive bacterial infections such as fin rot, gill disease, mouth rot, and skin lesions.

Can it be used in saltwater tanks?
Yes. Aqua Pen is effective in both freshwater and saltwater aquariums.

Does it affect beneficial bacteria?
Yes, it may affect beneficial bacteria, so water quality should be monitored.

Is it safe for invertebrates?
No. Remove shrimp, snails, and other invertebrates before dosing.

How long is treatment?
Typically 5–7 days, but not more than 10 days, depending on severity.

Is it safe for betta fish?
Yes, Aqua Pen is generally safe for bettas when dosed correctly.

Does it discolor the water?
No. Aqua Pen dissolves clearly without altering water color.

Is it safe for live plants?
Yes, generally safe for most aquarium plants.

Does Aqua Pen expire?
Yes. Check the packaging for expiration date before use.

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