• Fish Penicillin 500mg 60 Tablets
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Fish Antibiotic

Fish Pen Penicillin 500mg 60 Tablets Fish Antibiotics

$89.95 USD
$89.95 USD $99.99 USD
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Check The Latest Expiration

Fish Antibiotics Expiration Dates

Updated: 04/09/2026

At FishAntibiotic.com, we understand the importance of using fresh and reliable fish antibiotics for aquarium and ornamental fish. Monitoring expiration dates helps ensure product effectiveness and proper aquarium care.

This page is regularly updated to provide accurate information on commonly used fish antibiotics, including Fish Mox, Fish Flex, Fish Doxy, Fish Flox, Fish Zole, and Fish Sulfa. Use this reference to compare your current products and maintain safe treatment practices.

Why Expiration Dates Matter

  • Maintains effectiveness of fish antibiotics
  • Supports safe and consistent treatment
  • Helps avoid reduced potency in older products

Fish Antibiotics Expiration List

  • Fish Mox (Amoxicillin) 500mg – 100 Capsules: Expires 08/2028
  • Fish Mox (Amoxicillin) 250mg – 100 Capsules: Expires 05/2028
  • Fish Zole (Metronidazole) 250mg – 60 Tablets: Expires 12/2027
  • Fish Zole (Metronidazole) 500mg – 60 Tablets: Expires 02/2028
  • Fish Flex (Cephalexin) 250mg – 100 Capsules: Expires 04/2027
  • Fish Flex (Cephalexin) 500mg – 100 Capsules: Expires 06/2028
  • Fish Doxy (Doxycycline) 100mg – 30 Capsules: Expires 02/2027
  • Fish Doxy (Doxycycline) 100mg – 60 Capsules: Expires 06/2027
  • Fish Pen (Penicillin) 500mg – 30 Tablets: Expires 06/2027
  • Fish Pen (Penicillin) 500mg – 60 Tablets: Expires 06/2027
  • Fish Flox (Ciprofloxacin) 500mg – 30 Capsules: Expires 04/2028
  • Fish Flox (Ciprofloxacin) 500mg – 60 Capsules: Expires 04/2028
  • Fish Sulfa (SMZ-TMP) 960mg – 30 Tablets: Expires 12/2028
  • Fish Sulfa (SMZ-TMP) 960mg – 60 Tablets: Expires 12/2028
  • Fish Zithro (Azithromycin) 250mg – 30 Tablets: Expires 06/2028
  • Fish Cin (Clindamycin) 150mg – 100 Capsules: Expires 08/2027
  • Fish Flucon (Fluconazole) 200mg – 10 Capsules: Expires 02/2028

Important Information

  • For aquarium and ornamental fish use only
  • Not for fish intended for human consumption
  • Always store products in a cool, dry place
  • Check expiration dates before use

Stay Updated

We recommend reviewing this page regularly, as expiration dates are updated based on the latest available inventory. Keeping your fish antibiotics current helps ensure effective aquarium care and reliable treatment outcomes.

Accepted payment methods
  • ✔ Free Shipping on All Orders Over $50
  • ✔ Guaranteed Fresh Stock with Latest Expiration Dates 2028+
  • ✔ Fast, Same-Day Shipping Available Before 1 PM CST

Shipping and Return

Shipping & Returns

At FishAntibiotic.com, we aim to provide a reliable shopping experience with clear shipping and return policies. Please review the information below before placing your order.

Shipping Policy

  • Shipping Area: We currently ship within the United States only.
  • Processing Time: Orders are typically processed within 1–2 business days (excluding weekends and holidays).
  • Shipping Carriers: Orders are shipped via USPS and FedEx.
  • Delivery Time: Standard delivery typically takes 3–7 business days depending on location.
  • Shipping Costs: Calculated at checkout based on destination and selected shipping method.

Order Tracking

Once your order is shipped, a tracking number will be sent to your email. This allows you to follow your shipment during transit.

Shipping Delays

Delivery times are estimates and may be affected by factors such as weather conditions, holidays, or carrier-related delays. We appreciate your understanding.

Return Policy

Due to the nature of our products, we do not accept returns on opened or used items. This policy ensures product integrity and safety for all customers.

  • Returns may be accepted for unopened items in original condition.
  • Return requests must be made within 7 days of delivery.
  • Items must be unused and in their original packaging.

Non-Returnable Items

  • Opened or used products
  • Items not in original condition
  • Products returned after the allowed return window

Damaged or Incorrect Orders

If your order arrives damaged, defective, or incorrect, please contact us within 48 hours of delivery. We will review the issue and provide a suitable resolution.

Refunds

Approved returns will be processed after inspection. Refunds are issued to the original payment method. Processing times may vary depending on your payment provider.

Need Assistance?

If you have any questions regarding shipping or returns, please contact our support team:

  • Email: fishantibiotic.help@gmail.com
  • Phone: 12345667778
  • Address: 1309 Sheridan Avenue, Cody Wyoming 82414, United States

Fish Pen 500 (Penicillin) Fish Antibiotics 500mg Tablets – 60 Count

Fish Pen 500 is a trusted fish antibiotics solution formulated with penicillin, designed to support aquarium fish affected by common bacterial infections. The 60 count size is ideal for extended treatments, larger aquariums, or multi-tank use.

Penicillin is widely used in aquatic care for its effectiveness against gram-positive bacteria. It is commonly selected when fish show visible symptoms such as fin deterioration, mouth infections, or open sores.

Common Uses in Aquarium Fish

  • Fin and tail rot
  • Mouth rot (cotton mouth)
  • Body ulcers and sores
  • External bacterial infections
  • Early and moderate bacterial conditions

Dosage & Directions

Use one tablet (500mg) per 10 gallons of aquarium water. Crush the tablet and dissolve it in water before adding it to the tank. Repeat every 24 hours for 7–10 days depending on severity.

For optimal results, remove activated carbon filtration and perform partial water changes during treatment.

Important Guidelines

  • For aquarium and ornamental fish use only
  • Not for fish intended for human consumption
  • Maintain stable water parameters during treatment
  • Observe fish behavior and response to treatment

Storage Instructions

Store in a cool, dry place away from moisture and sunlight. Keep tightly sealed when not in use.

FAQ

What does Fish Pen 500 treat?
It is commonly used for bacterial infections such as fin rot, mouth rot, and body ulcers in aquarium fish.

How is this product used?
Crush the tablet and dissolve it in aquarium water before adding it to the tank.

When should I use the 60 count size?
This size is ideal for larger aquariums, extended treatment durations, or maintaining stock for multiple uses.

Can it be used in all aquarium types?
Yes, it is suitable for both freshwater and saltwater aquariums.