PENGARUH PEMBERIAN SINBIOTIK PADA PAKAN KOMERSIAL TERHADAP RETENSI PROTEIN DAN RETENSI LEMAK IKAN LELE DUMBO (Clarias sp.)= THE EFFECTS OF GIVING SYNBIOTIC ON COMMERCIAL FEED TO PROTEIN RETENTION AND FAT RETENTION OF DUMBO CATFISH (Clarias sp.) - HELIDA SYEVIDIANA, 141411133002 (2018)