hi julianna. when my kribs had their 1st batch, they were pretty good parents. they had their eggs ina stump and i never saw them until mama brought them out in her mouth. they paraded them around the tank for about a week and then one day something happened in my tank that made all my fish run to the top gasping for air, including the kribs. i never saw the babies again after things returned to normal so ive always assumed they ate them. the 2nd batch came(more this time) and they are still doing great. the biggest of this batch is about 3/4inch now and they look like minuture versions of their parents as well. act like them too. the 3rd batch came and was very small. their are only 6 left right now, but they seem to be doing well.
did you notice your kribs going into the cave after they "ate" the eggs? it could be that they are moving the eggs to a safer location. my kribs did this with the 2nd batch. she laid her eggs in a different stump(smaller and less secure) than the first, but after a day or so, moved them back to the big stump where they hatched. they will move the eggs and fry around in their mouths if they feel the need.
im sure if they failed this time, they will be successful eventually. then when they get the hang of it, youll bee looking for what to do with all the extra fish you own! good luck!