Apisto Hongsloi turning dark.gray

[DWinchester]

Suggestions/advice? My female apisto Hongsloi red has turned dark gray over the past few days. I orig thought she and her male were displaying spawning behavior, but she never turned yellow. The male completely ignores her now. This morning, she just sits at the bottom of the tank whereas she had been planting herself on a bed of moss on a branch. She wouldn't even eat blood worms this morning and appears to be losing weight. I've only had the apisto's for about a month. All other fish... discus, German rams, rummy nose tetra are doing well and have been there quite a while. Only the apisto's are new. No snails or new plants. Water parameters are within desired range and stable. Last wc 3 days ago.
I have set up my QT tank and am waiting for the temp to go to 85ish before I move her. I have matched the ph to that of the 91g Red Sea she is in.
I am not sure what to do once I move her. All Cure? Paraguard? Epson salts? No s/s of SBD though and no wounds.

 

[gerald]

Do you see any abdominal bloating and/or rapid breathing? If so it might be some type of bacterial infection in the kidneys, liver, other organs. Just a guess - not much info here to go on. Also is that white spot below the eye a sore/lump on the fish or just something in the water?