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Aqua Pen Penicillin 500mg – 60 Tablets
  • Aqua Pen Penicillin 500mg – 60 Tablets
  • Aqua Pen Penicillin 500mg – 60 Tablets
Aqua Pen (Penicillin) 500mg – 60 Tablets

Aqua Pen (Penicillin) 500mg – 60 Tablets

$89.99 $99.95

Aqua Pen (Penicillin) 500mg – 60 Tablets

Aqua Pen 500mg is a pharmaceutical-grade penicillin fish antibiotic widely used in aquariums to control gram-positive bacterial infections. Equivalent to Fish Pen, this trusted formula helps aquarists manage fin rot, gill infections, ulcers, popeye, and systemic bacterial outbreaks. The 60-tablet bottle provides a reliable supply for medium to large aquariums or extended treatment plans.

What Aqua Pen 500mg Treats

  • Fin & Tail Rot – Controls gram-positive bacteria and prevents tissue loss
  • Gill Infections – Reduces bacterial growth and supports healthy respiration
  • Skin Ulcers – Stops the spread of bacterial lesions and promotes healing
  • Popeye Disease – Controls bacterial swelling behind the eye
  • Systemic Bacterial Infections – Works against gram-positive strains inside the body

Why Choose Aqua Pen 500mg?

  • Equivalent to Fish Pen (Penicillin)
  • Pharmaceutical-grade, USP-standard quality
  • Effective against gram-positive bacterial infections
  • 60-count bottle for reliable treatment coverage
  • Ideal for fin rot, ulcers, and gill disease
  • No veterinary prescription required
  • Fast USA shipping with tracking

Product Specifications

  • Active Ingredient: Penicillin 500mg per tablet
  • Quantity: 60 Tablets per bottle
  • Form: Hard tablets
  • Use: For ornamental aquarium fish only (freshwater & saltwater)

Directions for Use

Add one tablet (500mg) per 20 gallons of aquarium water. Dissolve tablet before adding for even distribution. Repeat treatment every 24 hours for 5–10 days depending on severity. Perform partial water changes before each re-dosing. Remove carbon filters and UV sterilizers during treatment.

Stop treatment if no improvement is noted after 5 days. Do not exceed 10 consecutive days of treatment.

Storage Instructions

Keep sealed at room temperature (59°F–86°F / 15°C–30°C). Store away from light and moisture.

Important Disclaimer

For aquarium use only. Not for human consumption, livestock, or fish intended for food. Keep away from children and pets.

Frequently Asked Questions

Is Aqua Pen the same as Fish Pen?

Yes. Aqua Pen is equivalent to Fish Pen, containing the same active ingredient Penicillin 500mg.

When should I use Aqua Pen?

It is most effective against gram-positive bacterial infections, such as fin rot, gill disease, ulcers, and popeye.

Can Aqua Pen be used in saltwater tanks?

Yes, Aqua Pen is safe for both freshwater and marine ornamental fish.

Does Aqua Pen affect biofilters?

Like other antibiotics, it can affect beneficial bacteria. Monitor water parameters closely during treatment.

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