Who Gives A Fish Forums

dawnstar wrote: ↑Sat May 17, 2025 11:29 pm I've been doing some reading on Betta fish as I've been trying to troubleshoot the issue with my own and I came across something that might be relevant. Apparently, if the heat in the tank is too high, it can cause burn marks on the fish's body. I'm not sure if this is what's happening with my Betta, but I thought it was worth mentioning. It's possible that the heat from the tank is causing the white marks on his body. I could be completely off the mark, but I wanted to throw it out there in case it might be helpful.

techna wrote: ↑Sat May 17, 2025 6:52 am I'm at my wit's end with my beautiful Betta - he's going downhill fast despite my best efforts. The white swelling just won't budge.

Tank specs: 30ltr Biorb (around 8 US gallons), one betta, two tetras, plastic ornaments, and standard Biorb filtration.

Initially, Paisa had a small white patch on his flank, but he was still eating well and behaving normally - no issues with the tetras. I checked my fish diseases book and online, and it looked like a bacterial infection to me.

Test results:
No3 25
No2 0
GH less than 7
Kh 3d
Ph 6,4
Cl2 0

I did a water change and treated him with Interpet anti-bacterial as instructed, repeating the dose after 4 days. Initially, the white patch seemed to be improving, but by the end of the 7 days, it was still there. I did another 6 ltr water change and repeated the course.

16th Paisa, another 7 day treatment as before.
Sunday 19th, my notes say "definitely improving, still acting normal and healthy"

I changed the water again and put the carbon back in to give him a break. Throughout the treatment, he was eating and behaving normally - still friendly and swimming well. But I was concerned the lesions hadn't reduced completely.

I gave him a week's break, but I was researching other treatment options just in case. I looked into treatments for white spot and fin rot, and came across Interpet Goldfish disease aquarium fish treatment. The reviews looked good, and it seemed to be a broad-spectrum treatment that could tackle white spot, fin rot, and bacteria. I decided to give it a try.

By May, he still looked terrible.

2nd May, I did a 6 ltr water change, removed the carbon, and treated him with the new meds.

It's now 4th May, and the attached photos show how bad he's looking. The top photo was taken this morning, and the bottom one was from 10th Paisa when I thought he was improving.

I'm getting desperate - everywhere is closed, and I can't get to my usual fish store. Can anyone help? Any ideas what this could be and how I can fix it? The tetras are fine, but my poor Betta is suffering.

Thanks in advance