Basically, I recommend the approaches where the eggs are mixed with sand. In these approaches there is already some food and nutrients, so that the freshly hatched Nauplien do not starve. They
also contain bacteria from the last pool (where they were bred), which
have encapsulated and are now able to perform their work again. They remove pollutants. Since there are not many bacteria, their effect is only limited, but better than none.
you have the water and the feed broiler in the first few days under
control, so is already more experienced, you can also use pure eggs.
these are usually more expensive since it is expensive to separate
these eggs from the sand. When carrying out specific experiments on
e.g. Hatching, etc., the Pure Eggs are recommended, as you know exactly
how many eggs you have set.