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The aim of this study was to determine the appropiate probiotics dose to improve water quality in sangkuriang catfish (Clarias gariepinus) farming on aquaponic system with pakcoy (Brassica rapa L.). This research was conducted from February to March 2018 at Green House Ciparanje Faculty of Fisheries and Marine Sciences Universitas Padjadjaran Jatinangor, while the water quality test was conducted at the Laboratory of Research Centre for Natural Resources and Environment at same university. This research was conducted with an experimental method with a completely randomized design with 4 treatments 3 replications, namely treatment control or without probiotics), probiotics with a concentration of 0.12 ml / L, probiotics with a concentration of 0.25 ml / L , and probiotics with a concentration of 0.37 ml / L. The results showed that treatment addition of probiotic 0.25 mg/L gave the lowest ammonia and phosphate concentrations, spesific growth rate, survival rate and plant height, that was 0.006 mg/L and 0.150 mg/L, 0,019 %/day, 93 % and 12.20 cm respectively, meanwhile the lowest nitrate concentration was in treatment without probiotic of 7.094 mg/L).

Effect of Probiotics Addition with Different Dosage on Water Quality Performance of Sangkuriang Catfish (Clarias gariepinus) Farming in the Aquaponic System