Can someone diagnosing what is wrong with my demsel

King kongg

Feeder Fish
Jul 13, 2023
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So it started 5 months ago when I noticed Mt demsel is breathing faster. I posted same as R2R and they told me that it even has swollen stomach. They told me that it has some chronic disease(maybe kidney failure). I just want some advice as when I start to feed it daily, it starts to breath faster so I am feeding it in a gap of a day. I know it is hard to tell exactly what is it but still I am confused as everytime I think of enthausizing this fish, it come back to normal. This is an old vedio but can't get best angle as this fish is really fast

 
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