Micro worms for baby fish - Danio margaritatus

Hi Guys,
In my last post, I wrote about trying to breed Danio margaritatus.

The first try worked but at the moment I can see only 5 young fish in my rearing tank.
The minis are fed with single-celled and micro-worms.

The little worms are barely visible in the water. So here are some pictures with 300x magnification.

I give these worms into the basin with the minis and stir the water once.
I am curious if there will be more fish tomorrow. At the moment you can not see them in the picture so I will post some pictures when the little ones are a little bit bigger.