Help!!! Pleco wounded

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the loach

AC Members
Aug 6, 2018
How did he get this, aggressive tank mates or water quality problem? Did you test ammonia, nitrite, nitrate, pH?
Make sure you have good water quality, then I would use Microlift Artemiss to heal the wound/ulcer it is safe for catfish.


AC Members
Jun 28, 2006
SF Bay area, CA
I've never had a fish with that kind of ulcer/injury but I think I might look to an antibiotic to stop it getting bigger. Lots of large frequent water changes are always my first step.

A couple things I see is large gravel that can hold all kinds of poo, detritus & bacteria (do you vacuum it once/week?) & he seems quite thin. That maybe from your pic's angle...

Tell us all about your tank, size? how long have you owned your tank & this plec? What size is your tank & fish? Water changes, how much & how often? Do you have a test kit? What does it say?