... yellow color of egg production.2. Spirulina as a feed additive, in addition , be used as consumption of food ... or additives directly, and also for high-grade feed additive. Fed with Spirulina feed on shrimp, juvenile abalone, compared with the ... disease.3. Spirulina contains many essential trace elements, calcium, magnesium, sodium, potassium, phosphorus, iodine, selenium, iron, copper, zinc, iron ...