API Bettafix Antibacterial & Antifungal Betta Fish Infection Remedy, 1.7-oz bottle - Chewy.com

API Bettafix Antibacterial & Antifungal Betta Fish Infection Remedy, 1.7-oz bottle

Rated 4.1273 out of 5 stars
$4.49Chewy Price
$6.28Chewy Price
$4.27Autoship Price
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About This Item


  • A remarkable natural antibacterial remedy was designed for the treatment of Betta diseases.
  • Works to repair damaged fins and promotes fin regrowth.
  • Use on wounds, ulcers, mouth fungus, fin and tail rot and frayed or torn fins.
  • Use when you see signs of bacterial or fungal infections.
  • Helps to heal wounds and tissue damage.

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Questions & Answers

28 Customer Questions

Will this product help my betta with swim bladder ?
Answer by ChewyNov 21, 2017
These drops help with wounds, ulcers, mouth fungus, fin and tail rot and frayed or torn fins. It isn't intended for swim bladder.

Will this affect the snails in my tank?
Answer by ChewyJun 16, 2018
This treatment is designed for the use with tropical fish only and may cause harm to your snails.

My fish's gills won't seem to close and there puffed out and have these things poking out of them will this help? What should I do?
Answer by ChewyDec 14, 2017
If the Bettafix doesn't work we'd recommend trying the API E.M. Erythromycin to Treat Bacterial Disease in Fish. It works treats a wide range of bacterial diseases such as body slime, mouth fungus, open lesions, bacterial gill disease and hemorrhagic septicemia.

I was thinking about using this for my new Betta, who appears to have fin rot. I have a moss ball in his tank, will this med kill the moss ball? Should I remove it for the duration of treatment?
Answer by ChewyOct 23, 2017
As this product is natural it should not affect anything else you have in your tank except for crustaceans and will be safe for moss balls.

ReviewsWrite a Review

Rated 4.1273 out of 5 stars
55 Reviews
Would recommend to a friend

55 Customer Reviews

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Rated 5 out of 5 stars
By Redfish on Feb 2, 2023

works miracles

This saved my fish, Red. He was solid black originally, he turned white on the front half of his body and his fins and tail began to tear and become jagged. We tried a different brand of fungus/bacterial aid, it did not help. We used this daily for a whole week and he is almost completely black again and his fins are growing back and look healthy again

Rated 2 out of 5 stars
By Angel on Feb 19, 2022

Used it twice, not effective

I had a betta with tears, and he just overall looked like he wasn't doing well, used this he wasn't doing well so I medicated him again and it ultimately didn't work. Other medications work better than this on bettas.

Rated 5 out of 5 stars
By SamS on Jan 30, 2022

A great alternative

This is a great alternative to medicating your fish with antibiotics. If you catch things early this stuff works miracles. I keep it on hand for any of my bettas who may be looking under the weather.

Rated 5 out of 5 stars
By Diamond01 on Aug 27, 2021

Bettafix API

Great stuff!!!!, Our Betta was accidentally scooped out of his tank with a net, and dumped into the trash can with only God knows what in the bottom?#lookedlikemilk? I went to feed him a couple hours later, he was gone? Wasn't like him so I leaped into action searching for him. Found him swimming in trash can put him into his tank with a bottle of this BETTAFIX, and the tough little guy survived and hasn't looked better.

Rated 1 out of 5 stars
By Jasmine on Aug 27, 2021


Please do not buy this product or any other product that has the word “fix.” It is nothing but tea tree oil that causes more harm than good. You can ask many experienced fish keepers. Ive lost too many fish to this medication in the past.

Rated 5 out of 5 stars
By JUDY on Jul 5, 2021

sick betta

I haven't had to use it yet and just ordered it in case one of my bettas gets sick

Rated 5 out of 5 stars
By Justin on Feb 18, 2021

Saved my bettas life

Ludwig stopped eating, became lethargic, and was covered in a white cotton mold on his fins and gills. 1tsp/day had him good as new within 7 days. Never in my life would I have guessed that not only would I be buying medicine for a fish, but said medicine actually works. Truly amazing.

Rated 5 out of 5 stars
By AspentheBetta on Feb 7, 2021

Saved his fins

My betta has a nice tank, but his back fin had some unpleasant fin rot. It was horrible to see so I used this, did some water changes and within a week his fins are already showing new growth. And he’s energetic and happy again!

Rated 5 out of 5 stars
By Molly on Mar 16, 2021

Love chewy

Love the compan, so understanding about order not needed due to death of pet.

Rated 5 out of 5 stars
By Annie on Jan 15, 2021

Helps & heals

This worked great to heal our betta! Now he’s looking great, colorful & happy!