Hello.

I would like to know if someone here gave to is Yellow perch larvae,(Soy milk with Egg yolk).

A+

I think soymilk and egg yolk suspension are too small of particles for YP larvae to eat. Baking yeast at 4-10um is also too small for YP larvae to eat. Best first foods for yellow perch are 100 to 300um long and many rotifers fit that size range.