Update:
All larvae are doing well.
They are readily accepting every live food and my first try with axolotl pellets was successful this morning when I tried it in my group with the largest individuals

I hope they all get big enough soon, because they are eating nearly too much...
I breed lots of live food, like Daphnia, black worms and enchytreans but those larvae want more and more food...
So the biggest one really exploded after eating two siblings

It reached 5cm after less than two weeks
You can also see the hind limbs start to grow.
The others measure 3-4cm now.
regards,
Mario