Abstract

The purpose of this study was to examine the effect of different dietary of protein levels on water quality, growth performance of Asian swamp eels Monopterus albus (Zwiew, 1793) and productivity of pak choi (Brassica chinensis) in aquaponic systems. Swamp eels (47.4 g/con) were fed with 4 different dietary protein levels of 25% (NT1), 30% (NT2), 35% (NT3) and 40% (NT 4). The experimental swamp eels were hold in aquaponic recirculting system with pak choi (100 head/m2). The experiment was run for 60 days with two cycles of pak choi. The result showed that higher protein level of feed would induce higher concentration of nitrogen in the form of total ammonia and nitrate. There was a significant difference (P

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