Emergency food for newly hatched larvae?

[Apryld29]

So my first axolotl hatched 2 days ago. I immediately started my brine shrimp hatchery. I bought one this time around and now I have the majority of my axolotls hatched so I went to get the brine shrimp to feed and realized absolutely none of them hatched. I went and looked at the hatchery I bought and it says it takes 36 hours for them to hatch. I have no idea what to do now. I can go ahead and make a brine shrimp hatchery but I don’t really have the time to wait another 24 hours for them to hatch without my first axolotl going over 3 days with no food. I put a daphnia in there but it’s an adult and too big for them to eat I’m assuming. I can try adding more but all my daphnia look that size. Is there anything else I can offer them so I don’t starve them waiting on a new batch of brine shrimp??