Feeding and water changes are two of the most important factors in growth and development of the fry.
In my mature planted spawning tanks the fry eat infusoria and other microorganism for the first 3 days after they are free swimming and then I start adding newly hatched BBS with yolk sac intact for the first couple of weeks then I add white worms and later HUFA supplemented BBS.
I feed only live foods for the first 6-10 weeks depending on G & D
I start water changes 50% daily once I start adding live foods to promote G & D, prevent health issues and dilute the stunting hormone
I don't really have a strict feeding program as each spawn needs are different, their G & D dictate how, what, when and how long I feed, this is just general information on what has worked for most of my spawns and seasonal changes too, I feed daphnia, mosquito larva at times, seed shrimp, planaria and other critters and then I add my homemade foods in the mix as they grow and I move them to grow-out tanks starting at 20g moving up to 75g.
I also cover my spawning tank with a plastic veggie wrap after I remove the male or at least by the time they are 2-3 weeks of age to keep the air above the water warm and humid for the labyrinth organ, I want their first breath of air to be the same temp as the water and moist to prevent swim bladder issues now and later.
I keep my water temp at a steady 80F for spawning, egg development, wigglers.
I may turn the heat up to the 81-82F area (not always) by 2-3 weeks of age.
I don't use any filtration until they go into a grow out tank and that time varies from 2 weeks to 6 weeks, all depending on G& D