HI there, well done on your fry.
Not that I've loads of experience but I hope this helps. I wondered why I was unable to bring fry on past two weeks, and since has realised that it was because they were cramped in the hatchery or net.
this time I put them in a small 5 gallon tank and they're doing amazing, now big enough to go in the main tank.
hope my experience helps, i'm cedrtain it's what the others would recommend.
jeanette