We are working on astaxanthin production in the culture of the alga Haematococcus pluvialis. We established and design the experimental bioreactor system. We tested different strains of H. p.. . We screened biomass and astaxanthin production of 5 microalgal strains obtained from CCALA (Culture collection of Autotrophic Organisms). We like to selected the best and the most promising strains for further elicitation studies.