Most likely he won't touch the food. Why conditioning the male is very important.. the days/weeks spent eating multiple meals of high quality food (live, frozen, high brand pellets) a day should of built him up enough to sustain him during this time.
I wouldn't offer him any as if he doesn't eat it then it will sit and foul up the water as you don't want to go and mess with the tank by cleaning it out now (he may view you as a threat and eat the eggs).. and you don't want rotting food sitting there. Most males won't eat until days after being pulled.
If you are worried about him, you can pull him once all the fry have hatched, and then try to offer him food. A healthy betta can go a couple weeks with no food before side effects start to happen, if he was conditioned good then he shouldn't have trouble doing his job.
Plus, if he really wants food he will eat the eggs that aren't fertilized.
At this point I would do as very little as possible to the tank. I know it hard not to help.lol, but Dad's got this for now. The eggs and fry are so very sensitive at first that the slightest change in water could mean a major problem. And I leave my Dads with fry well after free swimming, and I have found they really will not take food until fry are free swimming, or not until they give up the nest sometimes. I'd be afraid to put live food in for fear it may end up going through the nest and causing a lot more work for Dad. I sometimes think, between the conditioning, the stalking the tank waiting for embrace, worrying about Dads well being, that spawning is way harder on us than on the bettas.lol
Oh, no kidding we're the wrecks!!! I haven't taken a shower in...?
I had the week off, so I've been obsessed. I am worried that Jack will die. I put Glow is back with her buddies; she seemed miserable in her QT tank. I'll be up late watching her. She is hanging closer to the bottom that usual, but she's gone up to each fish & they seem to know she's "one of them". She seems humbled, tired, and a little dazed. Can bettas get post-partum depression? I suppose, after having a hormonal firestorm rip through her, she's not going to feel like her aggressive little leader that she is. I just hope the others don't turn on her. So far, the others don't care that she's back.
Just drop a couple in and see what he does. Not every male is going to freak out and eat his eggs/abandon his nest just because you do stuff to their tanks.
My wild males get their regular water changes even when they have nests and fry because I don't have separate spawning tanks. As long as you don't decimate the nest or stress him out too much he should be alright.
That's why I wanted to add water: one edge of the nest is attached to the glass, and even though it's only down maybe 1/16th of an inch (which looks like a mile to me) I'm worried it will detach & get wrecked somehow.
Wow- wild types- do you have an info thread on that? Why did you choose wild types?