Possible Columnaris or Fish Fungus?

[Plaidboy]

I recently acquired 6 Daisy's Ricefish along with some juvenile neocaridinas. A white blotch appeared (or I first noticed) on one of them after a day in the tank. The transition out of the bag was a big traumatic for a couple of the ricefish, so I wonder if this could be an injury from that. It looks flat to the skin, and has not appeared to progress. The fish is behaving normally and eating fine as far as I can tell. pH: 6.9 Ammonia: 0ppm Nitrite 0ppm Nitrate 10ppm KH 2 GH 3.5 tank temp was 78F but raised to 81F when I thought it was possibly fungus... what to do?

Edited April 18 by Plaidboy

[Colu]

I would be suspicious of columnaris looking at the white patch what I would do as only one fish is showing symptoms is quarantine and treat with a combination of kanaplex and jungal fungus clear fizz tabs containing nitrofurazone following this treatment plan if other fish develope symptoms then I would treat the main tank @Plaidboy