Fungus Disease on Geophagus Brasiliensis Cichlid

My two males have been fighting and so one has come out with what looks like a fungus disease. I haven’t treated as yet. I’m not 100% sure if I should treat and how? Any suggestions will help if you know how to treat this kind of thing.
#aquarium #fish #cichlid

[@user-wm2nv5nt6x]

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[@quangmai7250]

How do you treat this?

[@CichlidLove]

I haven’t treated it. Treating it meant treating the whole tank for that one fish. I have removed it and left the one male, that should help with easing off the stress between the two males.