Swamp water has a low pH value of around 3-4, this is causes swamp water to not be optimally used for fish farming. The optimum pH value for catfish (Pangasius sp.) is 6.0-8.5. Efforts that can be made to increase the pH of swamp water is by liming. The purpose of this study was to determine the best dose of crab shell lime to increase water pH, growth, and survival rate of pangasius catfish. T…