Lemna perpusilla is an aquatic plant with important ecological functions, particularly as anatural feed sourcedueto its high protein content. This studyaimed to determine the optimal concentration of palm oil mill effluent (POME) as a growth medium for Lemna perpusilla. The research was conducted from October to November 2023 at the Algae Production House 3, Sei Galuh Palm Oil Mill, Kampar. A C…