Shrimp MASTER introducing new DCD 'Direct Contact Digestion' system in Rizhao, ShanDong Province, China. Using White Crane 'BioTime' dilute to water and spray. 'BioTime' will directly digest the protein once in contact. This is most effective system to cut down protein content in your culture tank and ponds, which will effectively reduce ammonia, nitrite, and nitrate. This system can be used in both growout ponds and hatchery tanks.