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 12 - Aug 17

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

4.8 ★★★★★
Based on 13 reviews
Sort
Highest Rating
Newest First
Oldest First
Product Reviews
T
Verified Purchase
Takia
San Leandro, US
★★★★★ 5
Perfect size for pittie pups
Color: GREEN, Size: 14 inch (Pack of 1), Style: FROG
This was a pretty good toy. I have three pitbulls. The puppy in my video is 65lbs for reference to the toy. I thought that since it was fluffless she wouldn't try to eat the thing but after a couple of days of tugging it with her brothers the toy's paw came off and I was not fast enough to prevent her from swallowing it. She got rid of it with little GI stress. I will say that even though she's not squeaking it in the video, it has a pretty loud squeak. Overall we had it for four days before 260lbs of pooches were able to get the squeaker out. If you have pits then you know this is 5-star worthy sturdiness.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on July 9, 2022
G
Verified Purchase
Gerri
Phoenix, US
★★★★★ 5
An Instant Hit and Everyone's New Favorite
Color: GREEN, Size: 14 inch (Pack of 1), Style: FROG
An instant favorite! It took quite a while for my dog to break the squeaker, too. I love that it uses a water bottle for the crinkle sound, and I'm kind of glad the squeaker finally bit the dust. That works out well for us. It's tough enough that it's not ripped yet. Our dog plays with this toy every day. No fluff to pull out was definitely a plus for me. It's a great toy for the price, and I think small and larger dogs would also enjoy it. Johan is 7 months old, weighs about 40 pounds, and always chooses a favorite toy. This one replaced a worn out toy frog that was smaller, but still treasured. I was so glad that he loves this one just as much. It's a little bit longer than a regular-sized water bottle and has dangly legs. I think you could also put plastic that crinkles inside it, and they would love that too. It has a velcro closure to keep whatever you put in there inside, and he hasn't figured out how to open it so far. Update: We just bought a second one of these because he enjoyed the first one to its conclusion. It lasted longer than most toys (about 4 months with HARD use by a giant puppy), and it is his most favorite soft toy. The original didn't rip or tear, but the velcro got worn out when he figured out how to open it. I probably could have fixed it easily, but since Johan is the goodest boy, I got him a new one.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 2, 2026
J
Verified Purchase
Joan's RV Life
Dallas, US
★★★★★ 5
Best Toy Ever! 🐾
Color: GREEN, Size: 14 inch (Pack of 1), Style: FROG
Hey, it’s me, your dog! 🐶 This Frog toy is AMAZING! No stuffing to pull out (finally), so I can chew and squeak it all I want without making a mess. The squeaker is SO satisfying, I carry it everywhere. It’s the perfect size for playing tug-of-war and fetch with my human. I’ve had it for a while now, and it’s still holding up strong—no rips or tears yet! If you love squeaky toys and want something that lasts, this frog is paws-itively the best! 🐸
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 6, 2024
A
Verified Purchase
Angelique Howe
Omaha, US
★★★★★ 4
Dog toy
Color: GREEN, Size: 14 inch (Pack of 1), Style: FROG
My dogs have destroyed this toy. Squeaker gone in a day and is ripped open. It was a great little toy just not for use with heavy chewers
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on July 5, 2021
T
Verified Purchase
TRP
Alexandria, US
★★★★★ 5
My dog loves this
Color: GREEN, Size: 14 inch (Pack of 1), Style: FROG
Easy to insert bottles into and easy to toss. My dog loves that it both squeaks and crunches. One of his new favorite toys.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 27, 2026

recommand products