This research aims to determine the best frequency of boster fermentation in improving the growth and survival of srikandi tilapia (Oreochromis niloticus). This research was carried out for 56 days in May-July 2018 held at UPT Fish Hatchery and Experimental Pond Faculty of Fisheries and Marine University of Riau. The design of this research is an experimental model using Completely Randomize De…