Strawberry rasbora and their fry eating baby brine shrimp
I initially fed the adult rasbora Aquarium co-op fry food and crushed Hikari micropellets/vibra bites. They took to my densely planted, well-established 20-gal long with Amano and Neo shrimp tankmates quickly.
They started breeding like crazy once I introduced daily baby brine shrimp, so now I have two rotating TJ's seltzer bottle brine shrimp hatcheries on rotation.
Plants include java fern, java moss, anubias nana, a mass of monte carlo that won't stay rooted in the substrate, and lots of floaters for shade (water hyacinth, amazon frogbit, water lettuce). The newly hatched fry have plenty of hiding spots as well as microfauna to eat on their own.
I don't do anything special wrt feeding fry vs adults. The fry are zippy and fearless—once they're big enough to hang with the adults, they all eat the same thing at the same time.