Abstract Laundry detergent waste is toxic and is able to endanger aquatic life and its environment. The aim of this research is to establish the impact of detergent waste on the growth and mortality of gourami fingerlings (Osphronemus goramy), as well as to discover the threshold value of laundry detergent waste that gourami fingerlings (Osphronemus goramy) can tolerate. Using a totally ra…