Tofu liquid waste is rich in micro and macro nutrients that can be used to grow microorganism such as Tubifex sp. To understand the effectiveness tofu liquid waste addition in the Tubifex sp. culture media, a study was conducted from July – August 2017. Different amount of waste was mixed with water, there were P0 (0% waste), P1 (25% waste), P2 (50% waste), P3 (75% waste) and P4 (100% waste).…