Addition of water from the treatment pond of pangasius fillet waste (Pangasius sp.) with different concentrations in the cultivation medium due to the population growth of Daphnia sp.

Live feed is very important in fish farming, especially in hatchery. Wastewater from processing fillets (Pangasius sp.) has a high organic nutrient content and has the potential to be used as a Daphnia sp. culture medium. This research aims to study the effectiveness of the addition of the liquid waste of Pangasius fillets in the Daphnia sp. culture medium using a completely randomized design (CRD); 5 treatments with 4 replications were conducted. The treatments were conducted by adding the liquid waste of Pangasius fish fillets at a concentration of 5%, 10%, 15%, and 20%. The control treatment for the live feed cultivation was in the form of a dry chicken manure addition with a dose of 2.4 g/L in the medium and without treatment. The main observed parameter in the study was the population growth of Daphnia sp. The supporting parameters observed were in the form of phytoplankton and bacterial abundance and water quality. The results showed that the addition of the water from the Pangasius fish fillet waste, as much as 20%, had the best results related to the population growth of Daphnia sp. Meanwhile, the water quality was still within the normal range during the Daphnia sp. culture.