Aqua Pen (Penicillin) 500mg – 100 Tablets
Aqua Pen (Penicillin) 500mg – 100 Tablets
Aqua Pen 500mg is a pharmaceutical-grade penicillin fish antibiotic trusted by aquarists to treat bacterial infections in ornamental aquariums. Equivalent to Fish Pen, Aqua Pen provides effective treatment against gram-positive bacterial conditions such as fin rot, ulcers, gill disease, and columnaris. With 100 high-strength tablets, Aqua Pen is ideal for both emergency treatments and preventive care in larger systems.
What Aqua Pen 500mg Treats
Aqua Pen is effective against a wide range of bacterial infections in ornamental fish, including:
- Fin & Tail Rot – Stops tissue erosion and encourages regrowth
- Columnaris (Flexibacter/Cotton Mouth) – Controls this fast-moving bacterial infection
- Ulcers & Skin Lesions – Reduces infection risk in damaged tissue
- Gill Disease – Relieves swelling and promotes healthy respiration
- Popeye Disease – Helps control bacterial swelling behind the eye
Why Choose Aqua Pen 500mg?
- Pharmaceutical-grade, USP-standard antibiotic
- Equivalent to Fish Pen (Penicillin)
- Broad-spectrum coverage for gram-positive bacterial infections
- No veterinary prescription required
- Fast USA shipping with tracking
Product Specifications
- Active Ingredient: Penicillin 500mg per tablet
- Quantity: 100 Tablets per bottle
- Form: Tablets
- Use: For ornamental aquarium fish only (freshwater & saltwater)
Directions for Use
Add one tablet (500mg) per 20 gallons of aquarium water. Dissolve in a small amount of water before adding to ensure even distribution. Repeat every 24 hours for 5–10 days depending on severity. Perform a 25% water change before each re-dosing. Remove carbon filters and UV sterilizers during treatment.
Stop use if no improvement is observed after 5 days. Do not exceed 10 consecutive days of treatment.
Storage Instructions
Store tightly closed at room temperature (59°F–86°F / 15°C–30°C). Keep dry and away from direct light and humidity.
Important Disclaimer
For aquarium use only. Not for human use or for fish intended for food. Keep out of reach of children and pets. Always follow aquarium safety protocols when medicating fish.
Frequently Asked Questions
Is Aqua Pen the same as Fish Pen?
Yes. Aqua Pen contains the same active ingredient, penicillin, commonly known as Fish Pen in the aquarium industry.
When should I use Aqua Pen?
Use Aqua Pen for gram-positive bacterial infections such as fin rot, ulcers, columnaris, and popeye.
Does Aqua Pen affect beneficial bacteria?
Like all antibiotics, it can affect your biological filter. Monitor ammonia and nitrite closely during use.
Is Aqua Pen safe for saltwater fish?
Yes. Aqua Pen can be safely used for both freshwater and marine ornamental fish.