This research was conducted from October to November 2018 at the Fish Hatchery Lukup Badak, Central Aceh. The objective of the Study was to determine the optimum dose of probiotics to the growth and survival of fish larvae (Osteochilus kappeni). The design used was a Completely Randomized Design (CRD) with 4 treatments and 3 replications. P0: Without Probiotics 0 mL/L water, P 0,3: Dose Probiot…