The goal of current study is to provide a cost-effective and environmentally sustainable diet for Cirrhinus (C.) mrigala fingerlings by incorporating Di Calcium Phosphate (DCP) into a plant-based diet to improve hematological indices, nutrient digestibility, and mineral absorption. Six test meals (0, 1, 2, 3, 4, 5) were created using different DCP levels (0, 0.20, 0.40, 0.60, 0.80 and 1.00 g/Kg). 20 fingerlings were placed in each glass tank for the trial and were fed twice daily. Values were subjected to one-way analysis of variance by applying Duncan’s test to find out the statistics of nutrient digestibility, mineral absorption, hematological indices and considered significant at p<0.05. Result showed that statistically improved values of RBCs (3.05×10⁶ mm^-3), Hb (8.01 g/100ml), and Ht (32.47%) were computed at diet 3 having 0.60 g/kg level of DCP, whereas test diet 2 (0.40g/kg) had the maximum value of PLT (63.40%). Significantly, the highest values of crude protein (70%) and fat (69%) observed at test diet 3 having 0.60g/kg level of DCP but, gross energy (68%) was observed at test diet 2 having (0.40g/kg DCP level). At test diet 3 (0.60g/kg), mineral absorption was likewise at its maximum value (Ca, Na, K, P as 72.21, 72.45, 66.55 and 72.47%, respectively). Compared to the control group and all other test diets, all of these values were significantly different. On the basis of these results, it can be concluded that, diet 3 (0.60g/kg) reduces the discharge of minerals and nutrients into water with improved hematological indices, as it was the optimal DCP level for producing economical and environment friendly feed for C. mrigala fingerlings.