Columnaris and Ich in tank

[sailesh10115]

Hey, I have a 55 gallon tank that has been infected with Ich yesterday morning.
We upped the temperature and started Ich X treatments with salt along with higher temp/

However, last night one of our bosemani rainbowfish passed away suddenly.
Is this Columnaris?
We think it could be because it was fighting with another fish, and not Columnaris.

Someone help