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Biofloc-based Catfish ( Clarias batrachus ) farming allows for improving water quality, and growth. To further optimize the biofloc technology, we modified it with carbonation and bio balls to improve the C/N ratio and the performance of the floc-forming bacterial consortium. The purpose of this study is to analyze several parameters such as floc volume, BOD (biological oxygen demand), COD(chemical oxygen demand), BOD/COD, TOM (total organic matter), TDS(total dissolved suspended), orthophosphate, sulfate. SGR(specific growth rate), FE(feed efficiency), FCR(feed conversion ratio), SR (survival rate) and to obtain appropriate and environmentally friendly technology that can be applied in producing Catfish based on biofloc. In this study, a completely randomized design was used with 5 treatments and 4 replications, From the results of the study obtained: floc volume (76–88 mL L −1 ), BOD (2.152–2.367 mg L −1 ), COD (5.462–7.312 mg L −1 ), BOD/COD (0.324–0.394), TOM (5.1–19.2 mg L −1 ), TDS (318–1560 mg L −1 ), orthophosphate (0.7–9.1 mg L −1 ), sulfate (18.1–34.0 mg L −1 ), SGR (0.058–0.066), FE (90.89–98.79%), FCR (0.933–1.104), SR (84–88%). In the future, the application of a combination of carbonation and bio balls in Catfish farming based on biofloc is feasible to be developed.

Modified biofloc technology and its effects on water quality and growth of catfish