Fungus question on plecos

[amazontank]

Have you tested your water?

Yes

If yes, what is your ammonia?

0

If yes, what is your nitrite?

0

If yes, what is your nitrate?

30

If I did not test my water...

1. ...I recognize that I will likely be asked to do a test, and that water tests are critical for solving freshwater health problems.

Do you do water changes?

Yes

What percentage of water do you change?

41-50%

How frequently do you change your water?

Every week

If I do not change my water...

1. ...I recognize that I will likely be recommended to do a water change, and water changes are critical for preventing future freshwater health problems.

I have a group of L397 plecos. A few of them have small fungus growth on fins. I raised the temperature to 86 and dosed salt 1 Tablespoon for 3 gallons.
My question should I quarantine the plecos showing signs of fungus or treat the whole tank? How contagious is it?

 

[kno4te]

No need to qt if it’s just primary fungus. Don’t believe it’s contagious but sick fish are susceptible. Certain fungus will grow in higher temps so caution with bump in heat.

 

[amazontank]

Thanks bro I'll keep things clean and hope for the best!
I'm gonna lower the temperature also!

 

[duanes]

It doesn't look like fungus to me, but a more focused shot on the area would help.
If it is, it would be cottony, and that's hard to see in the pic, even when edited.
Since many fish infections look very similar...

From the pic above, it looks like it could be anything from Lymphocystis (viral, no reliable treatment) to columnaris (bacterial needing an antibiotic with gram negative applications)

 

[amazontank]

Thanks for your message bro!
They seem to be more cysts looking than cotton looking. I'll try and get some better pics.
I'm thinking I might rehome the 3 plecos showing these issues if they don't get better soon.