That's a good-looking girl. 8)
And no, I don't think the 'blushy' patch around her gill plate is anything to worry about. I am kinda surprised someone hasn't taken you up yet on the 'free-to-a-good-home' donation deal you are offering for this girl. :?
It's too late for that now lol... We're gonna keep her in a 55-75g tank solo. I've fallen in love with her personality- she's a tank rearranger! She moves everything wherever she wants... for a few days. Then moves it again. It's very interesting.
Awww well now.... you won't be the first to fall hard for the charms of the Red Devil (or, closely related Midas Cichlid). MOST of the time they can be too much of a bully to keep successfully in community type tanks.
Whew! Just too much personality for everyone else to handle?
But, when kept individually as a so-called 'Wet Pet'? That's when they really seem to come into their own.
Yeah.... unfortunately for your girly girl Red Devil, it really is all about wishful thinking in there. White eggs are non-viable and the fungus, bacteria or whatever has started to claim them.
I'm kinda surprised she hasn't eaten the white ones already, (young Mom?).
And yeah, I wouldn't let this sort of thing disrupt your water change or maintenance schedule too much. Be careful of those fingers in there with her though! Sometimes they will surprise you with an all-out attack when covering some eggs like this - usually when you least expect it.... :x
A few (many) years back, when I was doing this Volunteer gig at the Virginia Aquarium I discovered just how nasty a protective, individually-kept Mom fish can be when covering some freshly laid eggs.
This happened with a saltwater Oyster Toadfish, Opsanus tau, and I was just doing some weekly cleaning with a water change. And, until that girl laid into my thumb I had no idea she was protecting eggs.
And well, 8 stitches later after a visit to the medical clinic... I definitely came away with a much healthier respect for egg-protective Mom fish in the aquarium.