Why are my Medaka fry not feeding?

My first medaka of the season hatched yesterday. Now there are more than a dozen spread across five varieties or so. Compared to other fish I've not observed them feeding strongly.
Are they too young being only 24 to 48 hours old?
Are they full on food they've found for themselves in these aged incubators?
I produce videos on a bunch of topics from bees to prospecting and a stack of stuff in between but many of them show off the use of traditional vintage tools. If you see a tool that you would like for your own I probably won't sell you mine but I may have another in stock or I can get one from France, Germany, Japan or wherever. I make little bit of money from selling tools but mostly I just like to share them and share how to use them.
My other Channels
Mad Scientist Prospecting / @madscientistprospecting
Chestnut_nag's tools and Woodworking
/ @chestnutnagstoolsfrom...
My ebay store
www.ebay.com.a...
If you like what we do maybe you could show your appreciation.
www.patreon.co...

[@ikoyDaPnoy]

these fry can feed on the green water and can already be full. also check the water temperature & hardness. Medaka fry usually do better in 76-82°F with a hard water (I use shrimp salt).

[@downunderfulla6001]

It does look a bit to new for feeding. But that’s just my opinion🍺🍺

[@StuartChignell]

Supposed to feed two to three days after hatching. Still not confident they are feeding but then some do seem to be growing. But then some seem to be disappearing. Its only my second season breeding fish. Previously I;ve always bought them from the hatchery. When I worked in the hatchery it was with trout and they are easy.