International Journal of Aquaculture, 2025, Vol.15, No.3, 149-154 http://www.aquapublisher.com/index.php/ija 153 when water temperature increases, metabolism and oxygen demand also increases, and the toxicity of pollutants also increases, because the life phase of silk worms is around 25 °C~30 °C. According to Syam (2012), a good acidity level for silkworms is between pH 6~7.6. Bacteria that break down organic materials into simpler compounds, which can then be used as food for silkworms. The acidity level value in treatment A and treatment B when silk worms were spread ranged between 6.8 - 6.9 and at harvest time the pH was 6.7. Silk worms have the ability to reproduce at a pH between 6~8 (Syafriadiman and Masril, 2013) Silkworms have been widely cultivated with various media, including the use of chicken manure and tofu dregs (Sari et al., 2021). According to Suharyadi (2012), silkworm cultivation media can also use tofu dregs because they contain nutrients suitable for the needs of silkworm life. The provision of tofu dregs for silkworm feed aims to meet the needs of silkworms. According to Jewel et al. (2016) silkworms obtain protein from their food, and tofu dregs have a protein content of 21.91% and carbohydrates of 69.41% where the carbohydrate content is used as an energy source for the growth of silkworms. 4 Materials and Methods Preparation of tools and materials, preparation of media, making silk worm food, distribution of silk worms, and maintenance of silk worms. Prepare a place for rearing silk worms (Tubifex sp.), namely using a 30×25×15 tray with a rectangular shape, with a mud height of 5 cm for treatment A and 4 cm for treatment B. Take 5 kg of mud from the pond using a hoe. The mud taken as a maintenance medium is first crushed using a sieve. The mashed mud media is added with a dose of probiotics (Smart bio fish fisheries). Feed for silk worms is 10 kg of tofu dregs which have been purchased directly at the tofu manufacturing factory. then the tofu dregs are put into an iron vat and fermented using 500 mL probiotics. Then mix evenly, after mixing evenly, cover with plastic packing and cover again with an iron lid so that air doesn't enter, then leave for 24 hours. Give 164 grams of fermented tofu dregs per tray in the morning or afternoon. Before feeding the silk worms so that the water circulation is turned off so that the food is not carried away by the water flow, the tofu dregs are spread directly on the surface of the media and left without recirculation for 10~15 minutes. The next thing to do when harvesting is to prepare 3 trays and fill each tray with clean water, then scoop out the part of the mud containing the silk worms using a filter and 1 bucket is used to place the filtered mud. Next, the silk worms have been harvested and cleaned from mud by taking it using a filter, then rinsing it with water that has been placed in a tray gradually so that the remaining dirt and mud is clean. Next, the clean silk worms are separated into a separate tray filled with water, then the worms are taken and counted. Before counting the worms, they are weighed first to find out the population obtained at harvest. According to Syarifuddin et al. (2022), cultivating silkworms using an apartment system is done by using flowing water recirculation with the aim of supplying DO in the media water. 5 Conclusion Based on the results of the study of Silkworm Cultivation Productivity (Tubifex sp.) in the Tray System with Different Doses in Maintenance Media at BPBAT Mandiangin, it was concluded that the addition of 10 mL of probiotics and molasses to the mud media (Treatment A). provides the highest productivity value, absolute biomass growth and silkworm population when compared to treatment B (probiotics and molasses 20 mL) this is because the use of molasses and probiotics in treatment A can be utilized more effectively by silkworms compared to treatment B which causes silkworms to experience overfeeding conditions so that silkworms cannot consume nutrients efficiently and have an impact on the reproduction of silkworms (Tubifex sp.). References Astuti K., Tri C., and Lutfhi D.U., 2017, Pengaruh pemberian fermentasi kotoran ayam terhadap populasi dan biomassa cacing (Tubifex tubifex), Jurnal Biologi, 10(1): 16-36. Bintaryanto B.W., and Taufikurohmah T., 2013, Pemanfaatan campuran limbah padat (Sludge) pabrik kertas dan kompos sebagai media budidaya cacing sutera (Tubifex sp.), UNESA J. of Chemistry, 2. Darillia R.N., Afifah K.N., Khasanah N., and Najikhah S., 2022, Manfaat cacing sutra (Tubifex sp.) di jembatan kartini sebagai larva pakan ikan, Seminar Nasional Sains and Entrepreneurship, 1(1).
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