The aim of the study was to determine the best doses of bioboost in the biofloc system for increasing the growth and survival rate of fish seed baung (Hemibagrus nemurus). This research was conducted for 50 days from April 2 to May 22 2019, in the Technical Service Unit (UPT) Hatchery and Experimental Pond of the Faculty of Fisheries and Marine University of Riau. This research was using the ex…