EFEKTIFITAS PEMBERIAN NITROBACTER TERHADAP LAJU PERTUMBUHAN SPESIFIK, KELANGSUNGAN HIDUP (SR), DAN RASIO KONVERSI PAKAN (FCR) IKAN LELE DUMBO (Clarias sp.) DENGAN KEPADATAN BERBEDA DALAM SISTEM AKUAPONIK = EFFECTIVENESS OF NITROBACTER ON SPECIFIC GROWTH RATE, SURVIVAL RATE (SR), AND FEED CONVERSION RATIO (FCR) OF DUMBO CATFISH (Clarias sp.) WITH DENSITY DIFFERENT IN THE AQUAPONIC SYSTEM - ADINDA SEPTYASARI TARAGUSTI, 141411131075 (2018)