<![CDATA[Freshwater crayfish (Cherax quadricarinatus) are among the most economically valuable aquaculture species, with strong market potential in both domestic and international markets. However, one of the major challenges in freshwater crayfish farming is the deterioration of water quality caused by the accumulation of uneaten feed and metabolic waste. This study aimed to evaluate the effects of combinations of organic materials used as bioremediation agents on the absolute weight growth and specific length growth rate of freshwater crayfish. The experiment was conducted from August to September 2025 at CV. Cova Aquaculture using a Completely Randomized Design (CRD) consisting of four treatments with three replicates each (12 experimental units) over a 30-day culture period. The treatments consisted of powdered dried Indian almond leaves (Terminalia catappa) applied alone as the control (Treatment A), combined with spinach powder (Treatment B), pumpkin powder (Treatment C), or bean sprout powder (Treatment D). The organic materials were applied every three days and after each water exchange. Data were analyzed using one-way analysis of variance (ANOVA). Water quality parameters, including temperature, dissolved oxygen, and pH, were monitored daily. The results showed that the highest absolute weight growth and specific length growth rate were obtained in Treatment C, with an absolute weight gain of 0.78 g and a specific length growth rate of 2.16% day⁻¹. The combination of dried Indian almond leaf powder and pumpkin powder may function not only as an indirect itional supplement but also as an environmentally friendly bioremediation strategy that helps maintain water quality, thereby supporting the sustainable culture of freshwater crayfish. ]]>
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