The research was carried out for 40 days, from 10 May to 20 June 2019, at the Fish Hatchery and Breeding Laboratory, Department of Aquaculture, Faculty of Fisheries and Marine, University of Riau. It aims to find out the impact of Tubifex sp. feed substitution duration with the best pasta feed on the growth and survival of Cyprinus carpio larvae that were kept for 40 days in 15 containers o…