I usually feed my male once a day while in the spawning tank.
I just wiggle bloodworms close to the nest and wait until he comes get them. I'm careful of not overfeeding and not leaving anything left over in the tank.
I do not feed pellets because, IMO, they will look too much like eggs to the male and he might end up eating the egg or fry.
It's so excting, isn't it? I love watching fry!