My kribs just had their first batch of fry as well. I have two other threads on here about it. So far, I've pretty much just let nature run its course. For the first few days, I took a shot glass and the handle of an exacto knife and ground up a mixture of flakes, shrimp pellets and algae wafers into a dust. I took a pile about the size of an advil tablet of the powder and mixed it in another shot glass with a little tank water. I used an eyedropper to suck the stuff up and squirt it at the fry. It was sort of difficult to really see if they were eating it at first, but I guess it's worked out. I fed them on this mixture for about 5 days or so. Since then, I've just been using ground flake. My flakes have a decent amount of algae content and the adult kribs didn't seem to be big fans of algae wafers, so I thought this would work best. The fry seem to pretty much constantly peck at the substrate, plants, ornaments, rocks etc as their parents take them around the tank.
Lately the parents have been sort of fighting with each other over the fry but I'm not completely worried.
Other than feeding, my first concern would be: what else do you have in the tank? Some fish might be willing to fight your kribs to get at the fry.