International Journal of Aquaculture, 2025, Vol.15, No.3, 149-154 http://www.aquapublisher.com/index.php/ija 151 different amounts of biomass, because the absolute biomass was low in treatment B due to the presence of organisms such as snails, mosquito larvae and maggots which were competitors for silk worms to obtain food in the form of tofu dregs and in treatment A there were no organisms due to the section of tray A it is placed on the top level, while in treatment B it is placed on the bottom level. According to Astuti et al. (2017) cultivating silk worms in the open can give rise to other biota, namely keong and culex which can cause low biomass growth and crop failure. Figure 2 Population growth of silk worms (Tubifex sp.) in response to different probiotic and molasses treatments 2.3 Silk worm population Based on the results of silk worm maintenance activities (Figure 3), harvesting the silk worm population for 31 days of maintenance obtained the highest population growth in treatment A of 138 720 ind/m2 and treatment B of 122 400 ind/m2. In treatments A and B, there were different population numbers in each treatment. This is due to food competition which results in the death of worms due to lack of food sources. Figure 3 Population graph of silk worms 2.4 Water quality measurement From the measurement of the water quality results in the A treatment (Figure 4), it can be seen that in this case the temperature is in the range of 25.9~27.4, which is still in good condition to support the growth and development of silk worm cultivation 3 Discussion The increase in silkworm biomass is also influenced by the use of probiotics and feeding tofu dregs that have been fermented with probiotics. According to Novita et al. (2018), the increase in silk worm biomass was due to the use of probiotics, and by providing tofu dregs as complementary feed. Apart from providing food during the maintenance period for silk worms, you must also pay attention to the water flow so that the water continues to
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