SKU: 81785239276

Fix Pen (Penicillin) Tablets Fish Antibiotics

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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
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Exchange/Return Notes
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SKU: 81785239276

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T
TexNewMex
Los Angeles, US
★★★★★ 5
Fantastic
Color: Beige, Size: A-132''W-6 Panel
I am perennially in the process of rearranging, reorganizing, getting ready for yard sales, changing the functions of various rooms, moving everything out of a room to do a deep clean, etc, which means that there is always SOME part of my house, if not the entire thing, that is a disaster zone. Having someone knock on my door triggers a "duck and cover" reflex because it's so embarrassing for anyone to see that I live like this. (I *feel* like I don't, really, because I know that all the various stages are all temporary, but when there's always something temporary going on, it might as well be permanent, you know?) So THANK HEAVENS for a room divider that is not only large enough to divide my uncomfortably long den in half the long way so I can shove all the messy parts up against the back wall -- that is not only simple and attractive and neutral and (this is important) NOT BLACK because I have multiple pets and anything black in this house will be pet-hair-colored within 20 seconds -- that not only has **SIX** panels for lots of options of how I want to divide the space/s -- but is also on WHEELS. Someone out there really does love me, it's true! The panels are stable *enough* - I'm not going to lie and say that nothing is going to knock them over, because I have some balance issues, and I also have cats, and both of those circumstances has resulted in a mess on at least one occasion. But in the cats' defense, they've never dealt with a room partition that didn't hang from the ceiling before; and in my defense, I just grabbed the first thing I could reach on the way down. Not the product's fault in either case. Assembly was a little dicey as I am currently in **bilateral** (oh yes, that's fun) wrist braces, so I had to give up until I had help. But I think if you're able-bodied, you shouldn't have any difficulty. The only down side is, now that I've hidden away all the mess so I can break out the holiday decorations, you know what happens next, right?? That's right... the PERMA-MESS ZONE. Oh no. Oh well. Full item name: Room Divider 132''W Wall Divider for Room Partition (Heavy Duty Base) 6 Panel Partition Room Dividers, Freestanding Room Divider Screen Separation W/Wheel Folding Privacy Screen Panel Space Separator (six panels, beige)
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 1, 2025
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E. Leon
Chelsea, US
★★★★★ 3
Difficult assembly, doesn’t fold well, looks good fully open
Color: Grey, Size: B-88''W-4 Panel
The instructions for this divider are very inadequate. After having to redo parts of the assembly, I have finally assembled it. The divider itself seems very nice when it is fully open, however it is not possible to fold it well as all the bars with the wheels go in various directions making it impossible to fold it neatly. And it has a large footprint. It is possible that I did not assemble it fully well because of the lack of adequate instructions. I am not even sure if I will keep it because I need to fold out of the way when nothing in use.
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Reviewed in the United States on April 16, 2026
K
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K.L
Chelsea, US
★★★★★ 4
Slightly challenging build
Color: Beige, Size: A-88''W-4 Panel
This was my second screen set I've purchased, first of this style. Not the easiest to assemble. Lots of pulling and tugging; not a highlight in my day.
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Reviewed in the United States on January 15, 2026
L
LBZ
Draper, US
★★★★★ 5
Commercial grade divider suitable for many needs
Color: Beige, Size: A-132''W-6 Panel
This item will be used at a future event where we need to separate a single locker room into two large areas, without any construction. This divider is perfect for the job because the partitions can be 1 to 6 panels and it will roll into place. When the event is over, the divider will fold/roll away and the locker room will return to its original design. The unit is very heavy, which will ensure that it is sturdy and stable. All the components arrived, wrapped in plastic to prevent damage. The screen material is a woven polyester in a cream color that will occlude any visibility but it may be possible to see shadows on the opposite side. The height is about 6ft, which would require a very tall person to "peep over" the divider. I needed a quality unit for this project and the frame, screens, and mobility will meet the needs. The divider is not the same as the small decorative dividers -- it is more of a commercial grade product, yet tasteful. If you want/need a small divider as an accent piece, this is not the best choice. This item could be used in a medical office, treatment/massage room, to divide an office room into two, or block a hallway in a building.
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Reviewed in the United States on December 2, 2025
M
Verified Purchase
Mr. Ruiz
Grantham, US
★★★★★ 2
Flimsy
Color: Grey, Size: B-88''W-4 Panel
Would not recommend
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Reviewed in the United States on April 14, 2026

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