<![CDATA[Peat water has a low pH and high organic acid content that inhibits the growth of Asian redtail catfish (Hemibagrus nemurus). This study aimed to evaluate the effect of chicken eggshell lime (CaO) on peat water quality and to determine the optimal dose to support the growth and survival of Asian redtail catfish. The study used a completely randomized design (CRD) with 5 CaO-equivalent lime dose levels (0, 5, 10, 15, and 20 mg/l) and 3 replications, over a 30-day rearing period. The results showed that increasing the lime dose significantly affected (P < 0.05) water quality and fish performance. The 20 mg/l dose treatment (P4) produced the best water quality, with pH 6.2 – 7.3, alkalinity 30 mg/l, hardness 42 – 58 mg/l, calcium 12.9 – 13.8 mg/l, DO 6.31 – 6.40 mg/l, and the lowest CO2 and ammonia levels (7 – 10 mg/l and 0.0998 – 0.1296 mg/l). The P4 treatment also produced the highest absolute weight and length growth as well as the highest survival rate (83.33% ± 5.77%) compared to the control (66.66% ± 5.77%). It is concluded that chicken eggshell lime at a dose of 20 mg/l is effective in improving peat water quality and is recommended as the optimal dose for rearing Asian redtail catfish.]]>
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