Perko is very important in the beginning of snail cultivation in the field. This is the first food of the baby snail which was transferred from the incubator to the boards in the field. It can be compared to breast milk for a baby. When the baby grows up a little, it will be gradually added compound feed, which over time will become its main food. But it is impossible to resettle the snail to the field without perko available there, it is very important to understand.