<![CDATA[Milkfish (Chanos chanos) is a species of high economic value and one of the primary commodities in aquaculture. This study aimed to evaluate the effect of different doses of Probiotic-7 applied to the rearing medium on water quality and the growth performance of milkfish fingerlings. The experiment was conducted using a Completely Randomized Design (CRD) with five treatments and three replicates: P1 (control, without Probiotic-7), P2 (1 mL/L), P3 (2 mL/L), P4 (3 mL/L), and P5 (4 mL/L). The best absolute length and weight growth were observed in treatment P3, with a weight gain of 3.83 g. Treatment P3 also exhibited the highest specific growth rate (SGR) of 5.1% and the most efficient feed conversion ratio (FCR) of 1.21. The highest survival rates were recorded in treatments P2 and P3, reaching 97.77%. Throughout the rearing period, water quality parameters remained within optimal ranges: salinity 26–29 ppt, temperature 29–30°C, pH 7.6–7.8, dissolved oxygen (DO) 7–7.8 mg/L, and ammonia 0.03–0.18 mg/L. These findings indicate that administering Probiotic-7 at a dose of 2 mL/L effectively enhances the growth and survival of milkfish fingerlings while maintaining water quality within suitable limits for cultivation.]]>
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