May becomes the propagation season of KOI.
It is suitable for laying when water temperature is 21 times from 18 times. Do the pond (water tank) where it is made to lay an egg separately. It is to avoid the water quality's getting bad.
Water temperature hatches in the 4th day when it lays an egg at 20 times. Hatching is delayed when there is a water temperature change (Water temperature falls down) at this time. The child who hatched it doesn't eat feed for three days.
It begins to eat feed from the fourth day when it hatched, and begins to swim. A water flea or the yoke of the boiled egg is suitable for the feed.