Credit: Proyrat Chaowajaroenpong and Ong-art Kumprasert (Thailand) Species of phytoplankton are Chlorella sp., Skeletonema sp., Chaetoceros sp. and Tetraselmis sp. Algal culture is carried out in 25-ton tanks which are far from rotifer culture area in order to protect rotifer from contamination. Culture condition: salinity 25 ppt, temperature 22 – 28 oC, aeration all day. Period …