Swamp land in Indonesia has not been utilized optimally mainly for fish culture. It is constrained by the low pH of water in swamps (ranged 3-4). Catfish potential to be developed in swamps, but to culture of catfish is needed a neutral pH between 6.5-8.5. Therefore, it is necessary to increase pH by alternative liming using lime of golden apple snail shells.This study aims to determine the bes…