Feed at their scale
Baby shrimp can graze across moss, plant leaves, wood, and filter surfaces. A mature aquarium offers many tiny particles and biofilm that are difficult to replace with one large pellet.
If supplemental food is needed, choose a product intended for shrimp or juveniles and follow its label. Very fine powders can spread quickly through the water.
Keep additions controlled
Use a tiny amount, watch the water, and remove visible excess where possible. Do not dust the entire tank heavily in an attempt to feed every baby.
A healthy planted setup gives young shrimp multiple grazing areas. Keep filtration running and avoid sudden water changes after feeding.
For your own tank
If using powdered food, begin with less than you think the tank needs and watch for clouding. Tiny particles spread quickly and are difficult to remove from moss. A mature surface remains useful even when supplemental foods are offered.
Use these as general hobby references. Test your aquarium and confirm product guidance before making changes.