Tropical lakes, characterized by relatively uniform water temperatures due to warm climates, still experience periods of thermal stratification. In recent years, these lakes have become hotspots for fish farming, driven by rising demand for affordable protein. However, mixing events—triggered by wind stress, convection, or both—can disrupt stratification, leading to the shoaling of the anoxic hypolimnion. This hypolimnion often contains high concentrations of sulfide, and during mixing, over 20% of the water column's available oxygen may be consumed through sulfide oxidation. These dynamics pose significant risks to in-lake aquaculture, particularly in eutrophic systems such as Lakes Batur and Maninjau, where frequent mixing can cause sudden anoxic or hypoxic conditions. The findings underscore the urgent need for continuous monitoring and adaptive management strategies to ensure the sustainability of aquaculture in tropical lakes.