First off, :bounce: CONGRATS!! :bounce:
After at least 30 odd successful spawnings under my belt, I still get excited every time I have a pair breeding.
Ok, to answer some of your questions...
Yes it is normal for males to have a small appitite during breeding, it is part of the conditioning to feed up the male aswell as the female. He will be busy protecting his eggs, then he will be busy catching fry and spitting them back into the nest.
Cambodian is a pretty dominant gene, therefore the majority of the fry will have pink bodies, then various shades of red to blue in the finnage. There will still be some dark bodied fry.
Foodwise, greenwater is a good starter, mixed with liquifry to get lots of greeblies in it, the bbs all the way.
Goodluck and keep us posted.