<![CDATA[Penelitian ini dilakukan di Laboratorium Hatchery dan Teknologi Budidaya Program Studi Budidaya Perairan Fakultas Pertanian Universitas Malikussaleh, dimulai dari tanggal 10 Juni sampai dengan 9 Juni 2015. Ikan uji yang digunakan adalah benih ikan Koi yang berukuran 5 – 7 cm. Tujuan penelitian ini adalah untuk mengetahu pengaruh media filter pada sistem resirkulasi air terhadap pemeliharaan ikan koi. Penelitian ini menggunakan metode eksperimental dengan Rancangan Acak Lengkap (RAL) non factorial dengan empat perlakuan dan tiga kali ulangan. Pertambahan panjang terbesar terdapat pada filter arang yaitu 0,47 cm dan terkecil pada filter kijing yaitu 0,36 cm. Pertambahan berat terbesar terdapat pada filter kontrol yaitu 1,21 gram dan terkecil pada filter kijing yaitu 1 gram. Hasil penelitian menunjukkan bahwa media filter pada sistem resirkulasi air tidak berbeda nyata terhadap pertumbuhan, konversi pakan dan kelangsungan hidup ikan koi.This study was carried out at Hatchery and Aquaculture Technology Laboratory, Aquaculture Department Agriculture Faculty Malikussaleh University started on June 10th to July 9th 2015. Experimented fish was goldfish fingerling which had length 5-7 cm.The purpose of this study was to know the effect of filter media on water recirculation system in raising goldfish. Experimental design used was non-factorial completely randomized design with four treatments and three replications. the highest length growth of goldfish was showed in charcoal filter which was 0, 47 cm while the lowest one was in kijing filter which was 0,36 cm. The highest weight growth of goldfish was obtained in control filter which was 1,21 grams and the lowest one was in clams (kijing) filter which was 1 gram. The result implied that filter media on water recirculation system did not give significant different on growth, food convertion ratio, and survival rate of gold fish.]]>
