SKU: 81785239276

Fix Pen (Penicillin) Tablets Fish Antibiotics

Sale price$41.39 Regular price$45.99
Save 10%

Pay in installments of $11.50 with ShopPay, AfterPay and Klarna

Shipping Estimate
USA
  • USA
  • CAN

Ships within 48 hours · Estimated delivery Aug 23 - Aug 28

Promo Codes Available:

For Your Every Summer RSVP, with Code: SUMMER15

Description

Fix Pen (Penicillin) Tablets Fish AntibioticsFix Pen (Penicillin) Tablets: Trusted Fish Antibiotics Fix Pen (Penicillin) Tablets are a dependable remedy for bacterial infections in aquarium fish. It is a broad spectrum antibiotic targeting gram positive bacteria to treat fin rot, columnaris, and gill disease. It's designed for ease of dosing and rapid dissolution, and it is safe for use in both fresh and saltwater aquariums, promoting health and vigor in your aquatic pets. Fix Pen (Penicillin)

Fix Pen (Penicillin) Tablets: Trusted Fish Antibiotics

Fix Pen (Penicillin) Tablets are a dependable remedy for bacterial infections in aquarium fish. It is a broad-spectrum antibiotic targeting gram-positive bacteria to treat fin rot, columnaris, and gill disease. It's designed for ease of dosing and rapid dissolution, and it is safe for use in both fresh and saltwater aquariums, promoting health and vigor in your aquatic pets.

Fix Pen (Penicillin) Tablets are a reliable and effective choice for treating bacterial infections in aquarium fish. Their formula is quick-dissolving, ensuring even distribution. It is easy to administer for both the beginning and experienced aquarist. For mild infections or more serious bacterial outbreaks, Fix Pen rapidly helps restore health and vitality to the aquatic environment.

Key Benefits:

  • Broad Spectrum of Action: This antibiotic is effective against an enormous range of bacterial infections caused by gram-positive bacteria, common in fish diseases.
  • Common Fish Infections: This medication is effective in treating diseases in fish, like fin rot, mouth rot, and skin lesions, caused by bacterial pathogens.
  • Easy Application: Penicillin becomes easily applied to your fish when its pills are dissolved in water or, where possible, with medicated feeding.
  • Relatively Nontoxic to Fish: When used properly, Penicillin can be relatively nontoxic in moderate doses for many species of freshwater and some marine species.
  • It can speed up the recovery process by stopping the development of injurious bacteria. In this way, Penicillin reduces the stress of infected fish and makes them healthy, as before, in a very short time.
  • It reduces the possibility of the infection spreading to other healthy fish in the aquarium or tank by treating the infected one.

Directions:

Add one 500mg tablet into the aquarium for each 20 gallons of water to be treated. Repeat 24 hours later. Make a partial water change between treatments. The duration of treatment will depend on the type and severity of infection - it is recommended that extended medication baths continue for at least 5 days, but no more than 10 days. If there is no improvement after 5 days, discontinue treatment.

Cautions:

For aquarium use only. Not for human use. This product should not be given to fish intended for human consumption. In case of accidental overdose, contact a health professional immediately.

Storage:

Keep the lid tightly fastened and store at a controlled room temperature of 59°-86°F. (15°-30°C).

FAQ

What does Fix Pen treat?

It is used to treat gram-positive bacterial infections such as fin rot and gill disease.

Can it be used in saltwater tanks?

Yes, Fix Pen is effective in both freshwater and saltwater aquariums.

Does it affect the beneficial bacteria?

Yes, Penicillin may affect beneficial bacteria, so close monitoring of water quality is required.

Is it safe for invertebrates like shrimp and snails?

No, Penicillin may harm invertebrates; remove them before treatment.

How long is the treatment duration?

Treatment generally lasts for 5-7 days, depending on the severity of the infection.

Can I use it for betta fish?

Yes, it is nontoxic for bettas when dosed correctly.

Does it discolor the water?

No, the Fix Pen dissolves clearly and does not color the water.

Is it safe for live plants?

Generally, yes, it is safe for most aquarium plants.

How should I store the tablets?

Store them in a cool, dry place, away from light and moisture.

Does Fix Pen expire?

Yes, check the expiration date on the packaging for maximum effectiveness.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 81785239276

Discover Niche Categories That Outsell

Top-Converting Item to Boost Your Average Order

4.6 ★★★★★
Based on 18 reviews
Sort
Highest Rating
Newest First
Oldest First
Product Reviews
S
Verified Purchase
Sangay Choizang
Los Angeles, US
★★★★★ 1
Not giving accurate time.
Color: Grey
Watch looks so fancy and standard but regretted to say that the pins on the bands are coming out easily, and does not giving accurate time. doesn’t worth it. Wish i can return it if possible.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 26, 2022
M
Verified Purchase
MingYolo
Draper, US
★★★★★ 5
Great watch so far
Color: Grey
Very lovely watch. Feels quality and rather heavy.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on September 27, 2024
D
Verified Purchase
Dan Panetti
Port Orchard, US
★★★★★ 5
Look and feel awesome!
Size: 11.5, Color: Optic White/Opti
These are awesome shoes - look great really, really white and clean! Love how comfortable they are - and soooo light. I was a little worried they'd get dirty easily, but I've been able to keep them clean. Fit as expected. If you're looking for a great, comfortable, and affordable shoe, check these out!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 4, 2025
J
Verified Purchase
Jeremy P
San Leandro, US
★★★★★ 5
Great shoe, comfort
Size: 11.5, Color: British Tan/Ivry
Love these shoes, they're super comfy. Laces stayed tied all day. I wear them in a business casual environment, or if I'm going out for a nice meal with my wife. They look good, the color is unassuming and neutral. they also elevate my height, I feel like it gives me an inch or so more versus regular shoes. This is my second pair!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 30, 2026
M
Verified Purchase
marcial ciprian
Carnegie, US
★★★★★ 5
Good shoes
Size: 7, Color: British Tan/Ivry, Size: 7, Color: British Tan/Ivry
Look very nice these shoes, speally to go out to dinner with the family, are really light weight, great quelith, and great softness
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 8, 2026

recommand products