Congrats!Once yolk sac is used up, look at bottom of flake container. You will find enough dusts of flakes which can be perfect for frys. As with any fry so young, need to be fed more often which will lead to leftovers. These leftover can foul water fast killing all the frys in no time. Try performing 10-15% water changes (age the water if possible), if possible vacuum gravel w/o sucking out frys. If setting up breeding tank next time,
bare bottom might make this water changes lot easier.
Look for Frozen Baby Brine Shrimps if wishes.
Monitor the water (test for
ammonia,
nitrite,
pH) daily until bit larger and/or understand the water chemistry that take place in fry tank!
As a kid, i have lost whole tankful of frys (not just once) due to lack of testing and/or understanding water chemistry changes in fry tank. They dont seemed to give you much room for errors as they are more sensitive than adults, IMO.