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Aqua Pen Penicillin 500mg – 30 Tablets
  • Aqua Pen Penicillin 500mg – 30 Tablets
  • Aqua Pen Penicillin 500mg – 30 Tablets
Aqua Pen (Penicillin) 500mg – 30 Tablets

Aqua Pen (Penicillin) 500mg – 30 Tablets

$59.99 $69.99

Aqua Pen (Penicillin) 500mg – 30 Tablets

Aqua Pen 500mg is a pharmaceutical-grade penicillin fish antibiotic designed for treating gram-positive bacterial infections in ornamental aquariums. Equivalent to Fish Pen, this trusted antibiotic helps aquarists combat fin rot, gill disease, popeye, ulcers, and systemic bacterial outbreaks. The 30-tablet size is convenient for hobbyists with small aquariums or those needing a short treatment cycle.

What Aqua Pen 500mg Treats

  • Fin & Tail Rot – Prevents further tissue loss and restores health
  • Gill Infections – Supports healthy breathing and reduces bacterial load
  • Popeye Disease – Helps control bacterial swelling behind the eye
  • Skin Ulcers – Protects against gram-positive bacterial lesions
  • Systemic Infections – Effective for internal bacterial conditions

Why Choose Aqua Pen 500mg (30 Tablets)?

  • Equivalent to Fish Pen (Penicillin)
  • Convenient 30-tablet bottle for small aquariums or trial treatments
  • Pharmaceutical-grade quality, USP-standard
  • Effective against gram-positive bacterial infections
  • Affordable option for short-term dosing
  • No prescription required
  • Fast USA shipping with tracking

Product Specifications

  • Active Ingredient: Penicillin 500mg per tablet
  • Quantity: 30 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 water. Dissolve tablet before adding for proper dispersion. Repeat treatment every 24 hours for 5–10 days as needed. Perform partial water changes before each re-dose. Remove carbon filters and UV sterilizers during treatment.

Stop treatment if no improvement is seen within 5 days. Do not exceed 10 consecutive days.

Storage Instructions

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

Important Disclaimer

For aquarium use only. Not for human consumption, livestock, or fish intended for food. Keep out of reach of 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.

Why choose the 30-count bottle?

This smaller size is perfect for short-term use, smaller aquariums, or aquarists who prefer to stock a smaller supply.

Is it safe for marine aquariums?

Yes, Aqua Pen can be used in both freshwater and marine ornamental tanks.

Does Aqua Pen affect biofilters?

Yes, antibiotics may affect beneficial bacteria. Monitor ammonia and nitrite levels closely during treatment.

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