Need (more) help with my betta

[smileyshrimp]

So I’ve posted about him before, hes been having problems lately and I can’t seem to cure them.
a while ago he got finrot which I tried to treat with water changes and Indian almond leaves, but he wasn’t improving so I treated him with salt for a 5 ish days waited a bit than treated with tetra lifeguard for five days. Then I stopped because his fins seemed to be getting better. His finrot Stopped improving got a bit worse, thinking I’ll treat him again but and now he is a bit lethargic? like he is laying around more but he still comes up to the glass when I’m there and he still eats really good. But then I noticed a white lump on his upper analfin, it was small when I first saw it and I though it was maybe his colors changing because he does that quite a bit. I thought maybe a tumor or ulcer? I really don’t know what it is or how to treat it.

He‘s in a 10g tank filter and heater half live have fake plants
I got him about 6 months ago
Nitrite: 0
Nitrate: 10-20
Ammonia: 0
temperature is 81-82 (heard that raising temp can help with illnesses)
ph: about 5.5-6.5 (last time I checked it was closer to seven adding a bit of calcium after I post this)

Can anyone identify the white lump? (Sorry he is really hard to take pictures of he zooms around when I come up to the glass, I’ll try to take better pictures if needed)

 

[bcfishtanks]

Looks like lymphocystis to me. My last betta got it recurring. I accidentally left his filter alone too long in a botannical blackwater aquarium, and he picked it up from some unseen dirtiness. I just kept his water clean and upped the tannins. While his never fully went away, my thick-lip gourami from another tank caught it through cross-contamination. Hers DID fully disappear with clean water and tannins, so it depends on the fish and its resiliency. My betta had previous issues with self-induced stress and tail-biting, so he was in a constant state of recovery.

All in all, lymphocystis is ugly but only causes real problems if the fish gets a secondary infection. Because your guy has been battling some things, this definitely won't help his cause. As I said, though, clean water, low stress, and tannins should help. It will take time, but it should help. Live plants may help with stress, too. You could also add an extremely low dosage of aquarium salt if he lives alone or with brackish invertabrates.

 

[smileyshrimp]

Thank you, googled some pictures of lymphocytes and it looks like it. I’m boiling up some almond leaves right now. I might consider low salt dosages he only lives with two nerite snails.