Red tail barracuda lump please help

[Samuel12429]

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?

10 ppm

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?

31-40%

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.

Hello I noticed my barracuda has a lump can someone please help me identify this. he is my first fish I have to heal him please help me out

 

[kno4te]

I’d suggest to try some maracyn2 or kanamycin.

 

[Samuel12429]

I’d suggest to try some maracyn2 or kanamycin.

OK kool what do you think I is and why maracyn/kanamycin