Fish Pen 500 mg 60 Tablets

Fish Pen 500 mg 60 Tablets – Penicillin Fish Antibiotics for Aquarium Use

Fish Pen 500 mg Tablets contain Penicillin 500 mg, a broad-spectrum antibiotic formulated for the treatment of gram-positive bacterial infections in ornamental and aquarium fish. Designed for both freshwater and saltwater systems, Fish Pen helps manage common bacterial conditions that affect fish health and aquarium stability.

Penicillin works by interfering with bacterial cell wall synthesis, preventing bacteria from multiplying and spreading within the aquatic environment. Its targeted action makes it commonly used for infections such as fin rot, mouth rot, skin lesions, and gill disease caused by susceptible gram-positive organisms.

Important: For aquarium use only. Not for human consumption. Not for fish intended for human consumption.

Key Benefits of Fish Pen 500 mg

• Effective Gram-Positive Coverage: Targets common bacterial pathogens responsible for fin rot, mouth rot, and gill infections.
• Rapid Dissolving Tablet Formula: Ensures even distribution throughout the aquarium water.
• Suitable for Freshwater & Marine Aquariums
• 60 Tablet Supply: Ideal for complete treatment cycles in medium-sized aquariums.
• Supports Faster Recovery: Helps reduce infection progression and limits spread to other fish.
• Beginner & Experienced Aquarist Friendly

When to Use Fish Pen 500 mg

Fish Pen may be considered when fish exhibit signs associated with gram-positive bacterial infections, including:

• Frayed or deteriorating fins (fin rot)
• Mouth rot or cotton-like lesions around the mouth
• Red streaking or skin inflammation
• Gill irritation or breathing difficulty
• Open sores or bacterial skin lesions
• Lethargy and reduced appetite

Before initiating antibiotic treatment, confirm stable water parameters and rule out fungal or parasitic causes.

Directions for Use

• Dosage: Add one 500 mg tablet per 20 gallons of aquarium water.
• Frequency: Repeat after 24 hours.
• Duration: Continue treatment for at least 5 days and no more than 10 days.
• Water Care: Perform partial water changes between treatments.
• Filtration: Remove activated carbon during treatment to prevent absorption of medication.

If no improvement is observed after 5 days, discontinue use and reassess tank conditions.

Precautions & Warnings

• For aquarium use only.
• Not for fish intended for human consumption.
• May affect beneficial bacteria; monitor ammonia and nitrite levels.
• Remove invertebrates such as shrimp or snails before treatment.
• Avoid overdosing.

Storage Instructions

• Store between 59°–86°F (15°–30°C).
• Keep container tightly closed.
• Protect from moisture and direct sunlight.
• Keep out of reach of children and pets.

Frequently Asked Questions (FAQ)

What does Fish Pen 500 mg treat?

Fish Pen 500 mg is used to treat gram-positive bacterial infections in aquarium fish, including fin rot, mouth rot, and gill disease.

Can Fish Pen be used in saltwater aquariums?

Yes, Fish Pen is suitable for both freshwater and marine aquarium systems when used properly.

Will Fish Pen affect beneficial bacteria?

Yes, Penicillin may impact beneficial bacteria. Monitor water parameters closely during treatment.

Is Fish Pen safe for invertebrates?

No, Penicillin may harm invertebrates such as shrimp and snails. Remove them before beginning treatment.

How long should treatment last?

Treatment typically lasts 5–7 days depending on infection severity, but should not exceed 10 days.

Is Fish Pen safe for betta fish?

When dosed correctly, Fish Pen is generally safe for bettas and other ornamental species.

Does Fish Pen discolor aquarium water?

No, Fish Pen dissolves clearly and does not significantly discolor water when used as directed.

Is it safe for live aquarium plants?

Generally, it is safe for most aquarium plants, but monitor plant health during treatment.

Does Fish Pen expire?

Yes. Always check the expiration date on the packaging and store properly for maximum effectiveness.