It is common with south American cichlids for the parents to eat the eggs the first few times, but I have no idea if the same applies to the African kribs.
Assuming they lay eggs and the parents don't eat them, they will have to defend the eggs against other fish in the tank. Depending on how successful they are, you may or may not have any left to hatch. Eggs hatch in 2 to 3 days and the newly hatched fry are called wrigglers. They are not free swimming at this stage and use the egg sac for food. Once they become free swimming after 7 to 8 days, they will need to be fed. I had success feeding microworms to apistogramma fry; there are several of these tiny worms which can be used - google banana worms, grindle worms etc as well as microworms. They will also eat newly hatched brine shrimp. You can sometimes find baby brine shrimp in the freezer at the fish shop.
If you want to go down the microworm route, you need to start a batch asap. There are lots of sellers; I always got mine from Ebay. You need at least two plastic tubs with lids - and holes punched in the lids; cheap instant porridge and a sachet of yeast. Sand the inside of the tubs to make them rough to help the worms climb up the sides. Make up some instant porridge with water about 1cm deep in the first tub, wait till it cools then sprinkle some yeast over the top. This is optional but the culture works better with yeast. Pour the starter culture on top and wait. Harvest the worms by scraping them off the sides of the tub, being careful not to get any porridge. If you want to deliver them right in front of the fry, add them to a small container of tank water, suck the liquid into a turkey baster and squirt it next to the fry.
The cultures do go off, which is why you need 2 tubs. After a week to 2 weeks, start a second culture with a spoonful of the first. You'll know by the smell when you need to dispose of an old culture.
The unused yeast can be stored in the freezer. It survives well - I have a breadmaker and keep the opened tins of yeast (cheaper than sachets!) frozen.