I've not heard of a zebra acara before. Do you have any idea of the scientific name or if the zebra if a common local name in your area? There doesn't seem to be a lot of info on the net about them. If they behave as most acara, I would let them do it for sure. As it is a first time for them, they may not get it right but assuming the conditions are right for them, they will be around again soon and do better the second time.
If you do want to save some fry, I find this method works for substrata egglayer. I let them tend and hatch the fry until they get past the wiggler stage and then use a plastic tube to siphon off a small number to raise. I do leave some for the pair as it seems to make the pair bond somewhat better and they are more reliable for the next time around. That would be assuming you don't have any nighttime scavengers like catfish in the tank.
If you do want to save some fry, I find this method works for substrata egglayer. I let them tend and hatch the fry until they get past the wiggler stage and then use a plastic tube to siphon off a small number to raise. I do leave some for the pair as it seems to make the pair bond somewhat better and they are more reliable for the next time around. That would be assuming you don't have any nighttime scavengers like catfish in the tank.