This reseacrh was conducted in July 2013 in the Laboratory of Natural Food Center for Development of Brackish Water Aquaculture Jepara, Central Java Province. This study aimed to find the best combination of technical Walne NH4NO3 fertilizer and salinity on growth of Spirulina platensis culture media. This study was an experimental research aiming to inoculate S.platensis with 2 g / l and the i…