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Columnaris or fungal problem?


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I need help identifying the problem to properly treat it. Here’s a picture. It’s not flat nor completely fuzzy. I thought it was fungal so I started using pimafix but now I’m afraid it could be columnaris because of the appearance of the saddleback patch 


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hello and welcome to kokos. could it be the beginnings of a colour change? if not, please do your best to answer the following questions so that we're able to help as accurately as possible.. would you be able to also provide a short video of the fish (concentrating on the patch)? sometimes things like this look a little different/better in video.


Test Results for the Following:

 Ammonia Level(Tank)

 Nitrite Level(Tank)

 Nitrate level(Tank)

 Ammonia Level(Tap)

 Nitrite Level(Tap)

 Nitrate level(Tap)

 Ph Level, Tank (If possible, KH, GH and chloramines)

 Ph Level, Tap (If possible, KH, GH and chloramines)

Other Required Info:

 Brand of test-kit used and whether strips or drops?

 Water temperature?

 Tank size (how many gals.) and how long has it been running?

 What is the name and "size of the filter"(s)?

 How often do you change the water and how much?

 How many days ago was the last water change and how much did you change?

 How many fish in the tank and their size?

 What kind of water additives or conditioners?

 What do you feed your fish and how often?

 Any new fish added to the tank?

 Any medications added to the tank?

 List entire medication/treatment history for fish and tank.Please include salt, Prazi, PP, etc and the approximate time and duration of treatment.

 Any unusual findings on the fish such as "grains of salt," bloody streaks, frayed fins or fungus?

 Any unusual behavior like staying at the bottom, not eating, etc.?

"If copy and paste doesn't work for you, quote this post and put your answers after each question."

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2 hours ago, Blackmoorbob said:

Make sure to change the video quality to see a better video! 480p and then restart video 


I'm still working on answering the list. Just thought to show the video first meanwhile. Thanks


thank you. does this fish usually remain pinned to the surface of the water? looks to me that the exposed parts is where the problem is. it also looks like the left side of body, the scales might be starting to lift. 

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We would need more information to help - definitely answer the questionnaire and Helen’s question.  Particularly - how long have all livestock been in the tank?  If nobody new has come in during the last three months it wouldn’t be columnaris :)

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