Use Yeast Probiotics together with the single kind of food: choose the suitable filter net according to the different growing period of the young aquatic animals, twist and wash before feed directly. The feeding amount is according to the youngs density of 200 to 400 thousand per cubic meter water, use the product of 2.0 to 4.0 grams per cubic meter water per day, together with other unit food reasonably (shrimp slices, the algae powder, egg yolk), divided the feedstuff into 6 to 12 times.