EVALUATION OF THE USE OF MALANG SAND AS A FILTER MATERIAL ON WATER QUALITY, PHYSIOLOGICAL RESPONSES AND PRODUCTION PERFORMANCE OF MUD CRAB Scylla Serrata. J. Ilmu dan Teknologi Kelautan Tropis 2020, 12 (3), 833-848. https://doi.org/10.29244/jitkt.v12i3.32939.