ABSTRACT Liquid organic fertilizer (LOF) Azolla sp. there are nutrients needed for the density of Chlorella sp. LOF Azolla sp. can be used as an alternative to inorganic fertilizers. Objective of this study to determine the ulitization of using LOF Azolla sp. for cell density of Chlorella sp. and find out the best dose that can be used on the culture of Chlorella sp. This research was conducte…