ABSTRAK This study aims to obtain the best dose of grotop booster for the growth and survival of tambaqui (Colossoma macropomum) in a recirculation system. This research was conducted in November-December 2020 at the Aquaculture Technology Laboratory, Faculty of Fisheries and Marine Affairs, Riau University. This study used a completely randomized design (CRD) with 5 treatment levels and 3 repl…