They look great .
I would think you could separate them any time now . The most important thing is they know to recognize food and eat it .
Do you plan on moving the parents or the fry ?
My male whipped the females tail the same as yours looks with their first spawn .It was the reason I separated them .
Here I was nervous also ;
http://forum.simplydiscus.com/showth...ter&highlight=
I moved the fry but I would move the parents in your case .My pair and fry were in a 60g so I moved he fry to a 29g and let the parents have the big tank to themselves .
They spawned days after being re introduced and I am still raising the fry who are 3 months old just 2 days ago ..
Here is my fry !