Air merupakan bagian penting dalam budidaya perairan, namun berbagai aktivitas seperti metabolisme ikan yang menghasilkan limbah menyebabkan air menjadi tercemar. hal tersebut dapat memengaruhi pertumbuhan dan kelangsungan hidup ikan nila. sistem resirkulasi menjadi solusi tepat untuk diterapkan, karena adanya filter yang berfungsi menjaga kualitas air tetap optimal. tujuan penelitian ini yaitu menganalisis efektivitas variasi susunan filter sistem resirkulasi terhadap pertumbuhan dan kelangsungan hidup benih ikan nila (oreochromis niloticus) dan variasi susunan terbaik filter sistem resirkulasi. rancangan penelitian terdiri atas 4 perlakuan dan 3 ulangan yaitu : kontrol (tanpa filter), perlakuan 2 (sabut kelapa + zeolit + bioball), perlakuan 3 (zeolit + bioball + sabut kelapa), perlakuan 4 (bioball + sabut kelapa + zeolit). parameter yang diamati adalah bobot mutlak, panjang mutlak, spesific growth rate (sgr), survival rate (sr) dan kualitas air. hasil penelitian menunjukkan pertumbuhan dengan susunan terbaik pada perlakuan p2. pertumbuhan bobot mutlak p2 adalah 1,66 g, dan panjang mutlak p2 adalah 1,23 cm. laju pertumbuhan spesifik pada p2 adalah 2,54% dan kelangsungan hidup pada p2 adalah 67%. berdasarkan analisis statistik menunjukkan susunan filter tidak berbeda nyata antar perlakuan terhadap pertumbuhan dan kelangsungan hidup ikan nila (oreochromis niloticus). namun susunan filter terbaik ditunjukan pada perlakuan p2 (sabut kelapa + zeolit + bioball). kata kunci: filter, ikan nila, resirkulasi

Water is an essential element in aquaculture, but various activities such as fish metabolism that produce waste cause to become polluted, it can affect the growth and survival of tilapia. the recirculation system is the right solution to be applied because of the filter that functions to maintain optimal water quality. the objective of this study was to analyze the effectiveness of variation in the arrangement of recirculation system filterson the growth and survival of tilapia (oreochromis niloticus) seeds and the best variation of the arrangement of recirculation system filters. the research design consisted of 4 treatments and 3 replicates, namely: control (no filter), treatment 2 (coconut filter + zeolitl + bioball), treatment 3 (zeolite + bioball + coconut filter), treatment 4 (bioball + coconut filter + zeolite). parameters observed were absolute weight, absolute length, specific growth rate (sgr), survival rate (sr) and water quality. the results indicated that the growth with the best arrangement was found in the p2 treatment. p2 absolute weight growth was 1.66 g, and p2 absolute length was 1.23 cm,specific growth rate in p2 was 2.54% and survival rate in p2 was 67%. based on statistical analysis, the filter arrangement was not significantly different between treatment on the growth and survival of tilapia (oreochromis niloticus). however, the best filter arrangement was shown in the p2 treatment (coconut filter + zeolite + bioball). keywords: filter, tilapia, recirculation