A 60-day experiment was conducted to optimize fish and plant component ratio in a recirculating aquaponic system. Three different fish: plant component ratio of Rohu (Labeo rohita) spawn to Spinach (Spinacia oleracea) plant viz. T1 (40 spawn:10 plants), T2 (40 spawn:14 plants) and T3 (40 spawn:18 plants) were assigned as treatments. All the treatments were compared for fish growth, plant growth, and various water quality parameters were observed to determine the best component ratio which

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... ins better water quality and gives better growth. Among all the treatments, the higher growth rate of fish was observed in T2 (5.08±0.12) followed by treatment T3>T2>C. At the end, the total production of spinach in terms of weight was 508.10±8.89 g in T2 followed by treatments T3 and T1. Based on the results, the fish: plants component ratio of 40 spawn:14 plants can be recommended for production of rohu seed and spinach in recirculating aquaponic system