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Although recirculation is a cultivation system that has been tried in various commodities, but the effectiveness of this system to the growth and survival of catfish juvenile has not been done. This study aims to determine the effective-ness of recirculation system on growth performance and survival rate of catfish juvenile (Pangasianodon hypophthal-mus). The research was conducted from 11 October to 30 November 2019 at hatchery unit Department of Fisheries Extension, Jakarta Technical University of Fisheries. This study used experimental method with 3 treatments, namely Control (K: 100% Bioball + Bacillus sp.), Treatment 1 (P1: 50% Bioball + 25% zeolite + 25% resin + Bacillus sp.) and Treatment 2 (P2: Bioball 25 % + zeolit 50% + resin 25% + Bacteria Bacillus sp.). The catfish used in this study was measured 0.08 + 0.02 g. Ind.-1. The fish were kept in a concrete tub of 100 cm x 150 cm x 70 cm with water volume of 750 liters tub-1. Stocking density of fish was 5 fish liters-1. Fish juveniles were fed with commercial feed with a dose of 3% of fish biomass with frequency of 3 times a day-1. Observation fish growth and water sampling for monitoring of the abundance of nitrogen-decomposing bacteria and water quality were carried out every 15 days. The results showed that the highest growth weight of catfish seedlings was found in treatment P1 (0.447±0.142b) compared with K (0.377±0.047a) and P2 (0.363±0.057a) treatment. The values of survival rate for K, P1 and P2 treatments were 51±8, 54±4 and 52±8, respectively. This result implies that no significant difference in the survival rates in all treatments.
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