There is no right nor wrong method. There is only what works for you.
Some feed others don't - you have to find what works for you.
Some say water will go bad, some say it induces egg/fry eating.
Contrary, some say male will feed fry.
The fact is; most males (and often females) will reduce eating to a minimum. Some won't even eat.
I always try to feed them - before and after spawning (they're too "busy" to eat while they spawn/embrace. LOL). I always have live tubifex in the breeding tank and I would add other food sparingly every day. . . just my method.