Golden Gouramis

[Auslander]

Hi Guys. I have two Golden Gouramis and one of them has started to develop a small whitish patch just behind her nose (I think they are female). It is about 3mm in diameter. She doesnt seem to be at all bothered by it, and is swimming around quite normally. The water quality is good, with 0ppm Nitrite and 0ppm Ammonia. Is this anything to be worried about and what could it be?
Also, the Gourami I just described is a bit of a bully to the other one. She doesnt pick on any other fish in the tank, but can be nasty to the other Golden Gourami. The other one has now taken to only staying by the filter, and only comes out for food. Is there anything that can be done?
Any help gratefully accepted. Cheers.
BTW, am I right in thinking that this is a US site?

 

[Colisa lalia]

I think she maybe a female trying to establish herself in the hierarchy. I would suggest that the sot is from a rubbed off scale. Nothing much make sure it doesn't get infected. Also you may want to move the other gourami for it's own safety.

I didn't think it was a US site, I thought it was heavily UK, although I am from the US.