how to prevent fungal infections in Bettas

The sub forum dedicated to one of the most incredible fish in our hobby. Betta ask your questions in here!
User avatar
MouthFullofFish
Posts: 20
Joined: Thu Sep 07, 2023 11:20 pm

how to prevent fungal infections in Bettas

Post by MouthFullofFish »

My betta's fins look kinda fuzzy lately, and I'm worried it might be fungal. What's the best way to stop this before it gets worse? Tank's a 5-gallon with a sponge filter, heated to 78F, and I do weekly water changes.
FinGuru
Posts: 3
Joined: Thu Oct 10, 2024 7:03 pm

Re: how to prevent fungal infections in Bettas

Post by FinGuru »

Fungal infections often pop up when water quality dips or stress weakens their immune system. First, test your water for ammonia, nitrite, and nitrate. Even if params seem fine, bump water changes to twice a week for a bit. Add Indian almond leaves—they've got antifungal properties and help soothe the fish. If it's already advanced, a mild antifungal like methylene blue baths can cut it.
User avatar
Briteon
Posts: 16
Joined: Fri Jul 29, 2022 9:42 pm

Re: how to prevent fungal infections in Bettas

Post by Briteon »

Yep, FinGuru's spot on. Also, check if your filter flow's too strong. Bettas hate current, and stress makes 'em prone to infections. I'd skip the salt unless it's real bad, 'cause it can mess with their slime coat long-term.
User avatar
turbo2
Posts: 1
Joined: Thu Oct 10, 2024 3:29 am

Re: how to prevent fungal infections in Bettas

Post by turbo2 »

Water changes are critical. Fungus thrives in dirty water. Test your tap water too—sometimes it's got traces of chlorine or heavy metals that stress the fish. Use a conditioner that neutralizes both.
User avatar
fusion9
Posts: 6
Joined: Thu Jan 25, 2024 5:24 pm

Re: how to prevent fungal infections in Bettas

Post by fusion9 »

FinGuru wrote: Sat Aug 09, 2025 1:23 pm Fungal infections often pop up when water quality dips or stress weakens their immune system. First, test your water for ammonia, nitrite, and nitrate. Even if params seem fine, bump water changes to twice a week for a bit. Add Indian almond leaves—they've got antifungal properties and help soothe the fish. If it's already advanced, a mild antifungal like methylene blue baths can cut it.
Totally agree. I'd also dim the lights for a few days. Less stress, faster healing. And if you've got tankmates, make sure they're not nipping at the betta's fins.
User avatar
zeni9x
Posts: 18
Joined: Thu Oct 17, 2024 11:36 am

Re: how to prevent fungal infections in Bettas

Post by zeni9x »

My guy had this last year. I did daily 10% water changes and added a bit of aquarium salt. Cleared up in a week. Just don't overdo the salt—it's easy to mess up the dosage.
mistyk
Posts: 6
Joined: Thu Feb 01, 2024 2:30 am

Re: how to prevent fungal infections in Bettas

Post by mistyk »

If you're using meds, remove any carbon from your filter first. It'll absorb the treatment and make it useless. Also, keep the tank clean but don't scrub everything—you wanna keep some beneficial bacteria.
frostlyn
Posts: 6
Joined: Thu Oct 10, 2024 3:59 pm

Re: how to prevent fungal infections in Bettas

Post by frostlyn »

Prevention's key once you've got it under control. I feed my bettas a varied diet with frozen foods to boost their immune system. Healthy fish fight off fungus way better.
User avatar
chippy
Posts: 14
Joined: Thu Dec 14, 2023 5:42 pm

Re: how to prevent fungal infections in Bettas

Post by chippy »

Never had fungus, but my tank's planted. Plants help keep the water clean and stable. Maybe add some easy ones like java fern if you don't have any.
motto
Posts: 1
Joined: Thu Oct 10, 2024 9:34 pm

Re: how to prevent fungal infections in Bettas

Post by motto »

Briteon wrote: Sat Aug 09, 2025 2:14 pm Yep, FinGuru's spot on. Also, check if your filter flow's too strong. Bettas hate current, and stress makes 'em prone to infections. I'd skip the salt unless it's real bad, 'cause it can mess with their slime coat long-term.
This. My betta was stressed till I baffled the filter with a sponge. Now he's chill and fungus-free.
Post Reply