Mass-culture of microalgae will be conducted in outdoor 30-40 concrete tanks.Seawater for algae culture be sterilized by chlorine and be applied by pipe that itsterminal be set an auto-off water-valve controlled by water deep. A simple photo-senorswitch be modified and improved to control high-concentration algae be auto-harvestedby pump. The planktonic oyster larval be reared in indoor tanks that their interior behung an upside down pyramid-shaped frame plankton net for rearing water be in-outflowedby upwelling or down-sinking. A precise infrared-ray-senor switch be tested andre-equipped to detect low-concentration algae for auto-controlled applying D-stageoyster larval.