What disease might this be?

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Nove Sedici

Plecostomus
MFK Member
Apr 6, 2018
181
144
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Netherlands
Have you tested your water?
Yes
If yes, what is your ammonia?
0
If yes, what is your nitrite?
0 - 0,2
If yes, what is your nitrate?
5 - 10
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?
51-60%
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.
Sorry for the bad quality of the picture, but it is in a dark breeding tank.
But I think it’s clear what damage the fish has got.

two of my trimacs have got the same problem, at first I thought it was damage because of fighting with a breeding male but the female in this picture is separated from them so that’s impossible. The small Petenia in the same tank is absolutely fine.
Water parameters aren’t the problem.
Overfeeding (to be more precise: feeding more carnivore pellets than non carnivore pellets)might be a possible problem, too much fish protein/fat.

Can anybody tell me if this or something else is the problem?

the male on the other side of the tank seems to start recovering but his fry is eating from the wounding so tomorrow I will separate the fry

316603C6-E3C0-4B88-B549-63ABED1E9100.jpeg
 
Looks like bacterial infection.
Cant help any further though.
 
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I’d try some triple sulfa/kanamycin and methylene blue dabbed to the area on a qtip.
 
I’d try some triple sulfa/kanamycin and methylene blue dabbed to the area on a qtip.
Thanx! you’re thinkin of a bacterial infection as well i think?
I added sera baktopur (like triple sulfa) today and ordered methylene blue which will be delivered here on Thursday
 
Thanx! you’re thinkin of a bacterial infection as well i think?
I added sera baktopur (like triple sulfa) today and ordered methylene blue which will be delivered here on Thursday
Yea. Also just don’t want columnaris getting in.
 
Might be the right decision to treat for bacterial infection. After a 45 minute bath in strong baktopur solution and then in tank with normal dose the wound is already less swollen and seems to start healing. Yesterday I didn’t think there was any possibility for the fish to survive. Today I do think it probably will survive

thanx for the help so far!
 
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