Food is supplied twice weekly to the culture tanks. At these intervals, concentration of food organisms in the culture medium is brought to approximately 100,000 cells/ml,about equally proportioned between Rhodomonas and Isochrysis. The food culture are grown axenically in continuous culture at 20 C .Harvests are centrifuged at 480 g. and resuspended in fresh artificial seawater preparatory to feeding.
a renewed suspension of insoluble particles after they have been precipitated