+1 on the baby pro. It breaks up nicely and easy for the babies to find. I feed mostly powder form for the babies. I grind up a lot of the foods I already have with a mortar and pestle. Blanched veggies are also good.
those are super close up photo. Which camera you use?
The new born shrimps are mostly feed on algae, and microorganisms in the water. I would encourage a good green color algae growing in the tank. You can see the tiny babies would love to pick on them. And, I use shirakura baby shrimp bacter. The bacter is actually food for those microorganisms. It encourages microorganism growing in the tank. And because of it's strong favor, big shrimps would like it as well. The fresher the bacter the better. As soon as you open it, the function keeps going down. You should make sure it's close tight after you use it.