<![CDATA[Catfish (Clarias sp.) is one of the leading fishery commodities in Indonesia. Therefore, many people cultivate catfish, including the members of the Tambak Wedi Catfish Farmers Association (PPL), in Tambak Wedi, Surabaya. Located in the city of Surabaya, the limited water availability encourages catfish aquaculture to be conducted in urban aquaculture. However, pathogen infection became a challenge for PPL Tambak Wedi. The pathogen caused losses for catfish farmers in Wedi Pond. This causes the turnover of farmers to decrease and they have to close the aquaponics pond. One solution that can be done is giving biofloc. Biofloc has 3 main functions, namely improving water quality, as an additional feed ingredient for cultivated organisms and suppressing pathogens. The implementation of this activity consists of three stages, namely: (1) building an experimental pond and sites for catfish farming, (2) the extension and demonstration and (3) the application of biofloc in catfish farming. From this activity, it was found that previously members of the Tambak Wedi Catfish Farmer Association in Surabaya City, East Java, had already applied biofloc but experienced problems so that they were not continued. After this service activity, the cultivators were motivated to re-apply biofloc for their cultivation business.]]>
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