What is this? Please help

  • We are currently upgrading MFK. thanks! -neo
how to fix it? Can it be from him hitting his head?
Could be. Have u heard the fish jumping? Tankmates? Would increase ur water changes and a little salt 1 tsp per g.
 
Check your water parameters and let us know
 
I would start with daily water changes and see if it gets better or worse.

How big is your tank and what are the tank mates? What's your usual maintenance routine?
 
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My aro has had a similar whitish patch on it's head since around a week. Less severe than on the picture and its been slowly shrinking on it's own. No medication. Weekly water changes. I also around that time got a new uv bulb for my uv sterilizer but I doubt it has anything to do with it.
20191231_105630.jpg
Right near the right nostril. It was around 1/4 of the head big a week ago. I thought it was either a hit or he brushed against something but since it is going away I leave it alone.
 
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My aro has had a similar whitish patch on it's head since around a week. Less severe than on the picture and its been slowly shrinking on it's own. No medication. Weekly water changes. I also around that time got a new uv bulb for my uv sterilizer but I doubt it has anything to do with it.
View attachment 1399816
Right near the right nostril. It was around 1/4 of the head big a week ago. I thought it was either a hit or he brushed against something but since it is going away I leave it alone.
Thanks i will do water changes every 4 days since i am already doing it weekly
 
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