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Consumer protection is a crucial aspect in the face of rapid economic development and increased industrial competition, including in the bottled water sector. The Aqua product packaging defect case in Semarang in July 2017 is a clear example of weak quality control and the importance of producer accountability. Defects such as bottle caps that can be pried off without breaking the seal create uncertainty over product safety and reduce consumer confidence. Law No. 8/1999 on Consumer Protection provides a strong legal basis for consumers to obtain safe products and claim compensation for losses due to defective products. Manufacturers have an absolute responsibility to ensure product safety through the implementation of strict quality control systems, early detection of physical defects, and digital tracking for product recalls if necessary. In addition, consumer education and optimization of public complaint media are important parts of the consumer protection system. With a comprehensive preventive and corrective approach, risks due to defective products can be minimized, and public trust in the industry can be maintained.

Penarukan Village, located in Tabanan Regency, is predominantly inhabited by communities engaged in freshwater fish farming, particularly Nile tilapia (Oreochromis niloticus). The high demand for Nile tilapia in Tabanan and surrounding areas poses a challenge for farmers to manage the growth and development of the fish to ensure optimal quality. During the cultivation process, various issues arise that require effective solutions to support the sustainability of this sector. One of the main problems faced by fish farmers is related to the quality of biofloc pond water, which is still monitored using conventional methods. Poor water quality that does not meet the optimal living standards for Nile tilapia can hinder growth, reduce fish health, and negatively impact production yield. Manual monitoring methods are also prone to inaccuracy and complicate the data analysis process needed for effective decision-making.To address this issue, a technology-based solution has been proposed in the form of a real-time monitoring system using the “SI-NILA” mobile application integrated with a microcontroller-based Internet of Things (IoT) system. This system allows for continuous monitoring of pond water quality and automated pH control to maintain suitable conditions for fish growth. This innovation is expected to improve efficiency and effectiveness in fish farming practices, minimize the risk of crop failure, and promote the digital transformation of aquaculture in Penarukan Village, contributing to the sustainable development of the freshwater aquaculture sector.

This study aims to analyze the effect of water quality on the productivity of bamboo lobsters (Panulirus versicolor) cultivated in a floating net cage sistem (KJA) in the waters of Sinabang Bay, Simeulue Regency. Water quality is one of the main environmental factors that determines the success of marine cultivation, especially for high-value species such as bamboo lobsters. Water quality parameters observed in this study included temperature, salinity, pH, dissolved oxygen (DO), and ammonia levels. Measurements were carried out periodically during the 90-day cultivation period to capture environmental dynamics that affect the biological performance of lobsters. This study used a Completely Randomized Design (CRD) experimental design with three treatments based on different cultivation locations that have variations in natural water quality, each with three replications. The results showed that optimal water quality significantly affected the increase in bamboo lobster productivity, as indicated by the parameters of the specific growth rate (SGR), feed conversion efficiency (FCR), and survival rate (SR). The location with the best water quality (P1), which had high DO and low ammonia levels, recorded a daily SGR of 1.82%, a FCR of 1.6, and a SR of 90%. Conversely, the location with low water quality (P3) showed significantly decreased biological performance, with suboptimal SGR, FCR, and SR, primarily due to low dissolved oxygen and high levels of toxic ammonia. These findings emphasize the importance of continuous monitoring and management of water quality in marine cage sistems to support optimal lobster growth and survival. Therefore, managing aquatic environmental quality is key to increasing mariculture productivity and ensuring the sustainability of fishery resources in coastal areas.

This study examines the production costs and profitability of crab farming enterprises in Prapag Kidul Village, Brebes Regency. Using a quantitative descriptive approach, data were collected through in-depth interviews, field observations, and financial documentation from crab farmers. The research found that feed costs constitute the largest component of variable costs, accounting for 30% of total production costs. Financial analysis revealed favorable profitability levels with a Gross Profit Margin of 33%, Net Profit Margin of 24%, and Return on Investment of 30%. Factors significantly influencing profitability include cost management efficiency, market price fluctuations, crab quality, and access to capital. The findings suggest that systematic financial recording and cost management strategies are crucial for improving business sustainability and competitiveness in the crab farming sector.

Food security and community economic empowerment are major challenges in many rural areas, including Sukolilo Village. This research aims to develop and analyze the effectiveness of an aquaponic system, a combination of hydroponics and fish farming, as an innovative sustainable solution. The methods used include observation, experimentation, and interviews with the local community. The results showed that the aquaponic system is able to increase agricultural productivity with better water use efficiency and provide economic benefits through crop diversification, namely vegetables and fish. In addition, the system is proven to be environmentally friendly as it utilizes organic waste from fish as plant nutrients, reduces the use of chemical fertilizers, and optimizes local resources. The implementation of the aquaponic system in Sukolilo Village not only improves food security but also opens up new business opportunities for the community, thus contributing to the improvement of local economic welfare. It is hoped that this model can be replicated in other areas as part of a sustainable agriculture-based economic development strategy.

This study aims to analyze the service quality at Ketapang Urban Aquaculture (KUA), a mangrove ecotourism area in Tangerang Regency, using the Servqual theory encompassing five dimensions: tangibles, reliability, responsiveness, assurance, and empathy. This qualitative research utilized primary data from in-depth interviews with KUA management and secondary data from relevant literature. The findings indicate that physical facilities, such as trekking paths and informative signs, enhance visitor comfort. Educational programs run on schedule, and the complaint system effectively addresses visitor concerns. Friendly and well-trained staff provide a sense of safety and a positive tourism experience. However, challenges remain in optimizing sanitation facilities and digital promotion. The study concludes that KUA's service quality meets expectations, supporting sustainable ecotourism.

Tilapia (Oreochromis niloticus) production is very important to maintain food security and the Indonesian fisheries economy. Based on a literature study conducted from 2021 to 2024, this study aims to analyze the components that influence the productivity of tilapia cultivation. The method used is a literature study by reviewing various studies that discuss the technical, environmental, social, and economic aspects of tilapia cultivation. The results of the study indicate that government policies, fish density, feed, and water quality all affect the productivity of tilapia cultivation. In addition, there is evidence that advanced technologies such as biofloc systems and aquaculture transition systems (RAS) improve production efficiency and sustainability. This study provides suggestions for increasing productivity through optimal environmental management, use of appropriate technology, and policy support that supports farmers.

Rapid urbanization has led to an increased demand for food in urban areas. At the same time, land limitations and dependence on external supplies pose significant challenges to food security. Urban agriculture is an innovative solution for producing local food using limited land and modern agricultural techniques such as hydroponics, aquaponics, vertical farming, and rooftop gardens. This approach allows urban agriculture to be more resource-efficient, reduces distribution costs, and minimizes its environmental impact by lowering its carbon footprint. In addition to environmental benefits, urban agriculture also brings social and economic benefits by raising awareness of food sustainability, creating new business opportunities, and enhancing food independence in urban communities. This research uses a literature review method to examine various articles discussing the development, obstacles, and implementation of urban agriculture in different countries. The results show that urban agriculture makes an important contribution to improving food security while also providing a sustainable alternative for the global food system. Therefore, promoting the growth of urban agriculture from the perspective of sustainable food security requires support from government institutions, the private sector, and local communities.

This study aims to analyze the service quality at Ketapang Urban Aquaculture (KUA), a mangrove ecotourism area in Tangerang Regency, using the Servqual theory encompassing five dimensions: tangibles, reliability, responsiveness, assurance, and empathy. This qualitative research utilized primary data from in-depth interviews with KUA management and secondary data from relevant literature. The findings indicate that physical facilities, such as trekking paths and informative signs, enhance visitor comfort. Educational programs run on schedule, and the complaint system effectively addresses visitor concerns. Friendly and well-trained staff provide a sense of safety and a positive tourism experience. However, challenges remain in optimizing sanitation facilities and digital promotion. The study concludes that KUA's service quality meets expectations, supporting sustainable ecotourism.

potential if managed well. The Depapre coastal area is famous for its marine tourism. The sea water is still clean and clear, beautiful coral reef cover and the charm of seagrass beds with various types of fish that live around them are what attract tourists to visit this area. However, aquatic ecosystems, especially macroalgae, are under threat of degradation. The aim of this research is to identify types of macroalgae as initial data for monitoring and consideration in efforts to process biological resources, especially the composition and distribution of macroalgae.The method used is the roaming method (road sampling), the population of this study is various types of macroalgae found in Dormena coastal waters, while the research sample is all types of macroalgae found in the roaming area. The data obtained was processed qualitatively using a macroalgae identification key book. The results of research in the waters of Doromena village, identified 9 species of macroalgae, namely Chaetomorpha spiralis Okamura (Chorophyta), Halimeda macroloba Decaisne (Chorophyta), Phadina australis Hauck (Phaeophyta), Sargassum binderi (Phaeophyta), Sargassum cristaefolium C. Agardh 1820 (Phaeophyta), Turbinaria conoides (J. Agardh) Kützing 1860 (Phaeophyta), Chondrus crispus Stackh (Rhodophyta), Corallina officinalis Linnaeus 1758 (Rhodophyta), and Gelidium sp. J. V. Lamouroux 1813 (Rhodophyta). 

Microplastic pollution, particularly from textile waste, has become a significant environmental concern, especially in urban runoff systems. These pollutants pose a considerable threat to water quality, aquatic life, and human health. Traditional wastewater treatment methods often fall short in addressing the complexities of microplastic contamination. This research explores the integration of advanced biodegradable polymer coatings with solar-powered textile waste treatment to reduce microplastic pollution in urban runoff systems. Biodegradable polymers, such as polylactic acid (PLA) and polyhydroxyalkanoates (PHA), are highlighted for their potential to efficiently filter microplastics while providing an eco-friendly alternative to conventional filtration technologies. By combining these materials with a small solar-powered unit, the prototype enables an off-grid, low-energy solution to treat textile wastewater in urban environments. The study includes testing the prototype in simulated urban runoff conditions with varying concentrations of microplastics, evaluating key performance indicators such as microplastic removal efficiency, energy consumption, and operational sustainability. Results demonstrate a significant reduction in microplastic concentration, indicating the effectiveness of biodegradable polymer coatings and solar-powered systems in treating urban runoff. The discussion addresses the feasibility of using local biodegradable materials, performance in real-world urban environments, and operational challenges such as maintenance and scalability. This innovative approach is compared with existing microplastic filtration methods, such as membrane filtration and adsorption, highlighting its advantages in terms of sustainability and cost-effectiveness. The findings suggest that this integrated system could offer a viable, low-cost solution for addressing microplastic pollution in urban drainage systems, with potential for widespread urban implementation.

This study aims to analyze the growth performance of catfish (Pangasius sp.) cultivated in a tarpaulin pond system. Patin fish farming is one of the leading fisheries subsectors in Indonesia due to its high market demand and high nutritional content. The tarpaulin pond system was chosen because it offers efficiency in water quality management and disease risk reduction. This study was conducted in Gunungsitoli in December 2024, using an experimental method that included measuring fish length and weight during the rearing period. The results showed that water quality, including temperature (26-28°C), pH (6.5-7.5), and dissolved oxygen level (5 mg/L), played an important role in determining the fish survival rate, which reached 90%. Feeding strategies with a combination of artificial and natural feeds (silkworms, Artemia) have been shown to significantly improve fish growth. The main challenges in this aquaculture include water quality fluctuations, fry adaptation, and disease management, which can be overcome with aeration technology, probiotics, and natural immunostimulants. With the right innovations, the tarpaulin pond system proves to be an efficient and sustainable farming method in supporting catfish productivity.

Water hyacinth is an aquatic weed that is often found in tropical and subtropical areas. The existence of this plant often has a negative impact on the environment. Various efforts have been made to overcome the water hyacinth problem, including the use of pesticides. However, inappropriate use of pesticides actually causes plant resistance to pesticides, so that these efforts become less effective in controlling their growth. To overcome this problem, training was held for village communities to use water hyacinth as a basic material for handicrafts. This training aims to change people's views which previously considered water hyacinth as a nuisance plant into an economic opportunity. By processing water hyacinth into a marketable product, it is hoped that the community can increase their income while overcoming environmental problems

Cv. Adikarya Teknik is one of the manufacturing companies engaged in the field of mechanical engineering that produces wire mesh and conveyor table top chains. Cv. Adikarya Teknik has 6 projects that did not meet the 2024 work targets, resulting in delays in the completion of Conveyor Table Top Chain products. The delays are quite significant, with the work for Aqua Mineral Water being delayed by 11 days and Pocari by 10 days. Production analysis using the CPM and PERT methods to identify priority issues of delay risks and improve operational efficiency. By using the CPM method, it was found that the critical path of the Conveyor Table Top Chain production project lies in activities A-B-C-E-F-G-H-I-J-K-L-M-N (all located on the critical path). There is slack in activity D (Incoming Material); if it is delayed, it will not affect the critical path activities. The results of the PERT method on the Conveyor Table Top Chain project show that the probability of the conveyor production project being completed faster than the usual time, which is within a duration of 127 days, is 84%.

Fish is one type of aquatic product widely used by the community because of its advantages as a food ingredient, including a source of important nutrients such as protein, vitamins, fat, and minerals. Fish is often found in cans. Canned packaging contains the heavy metals lead (Pb), cadmium (Cd), and zinc (Zn), which can be released into food due to the long storage period. This study aims to identify and analyze heavy metals Pb, Cd, and Zn levels in canned tuna with an expiration date of less than 1 year. Samples of canned tuna came from five different brands. Qualitative analysis used color reagents, while quantitative research used an atomic absorption spectrophotometer (AAS). The qualitative study results showed that three samples of tuna contained heavy metals. Samples B and C were positive for Pb metal, while samples A and B were positive for Zn metal. The concentration of Pb metal was measured in sample B at 117.9 mg/Kg and in sample C at -0.0147 mg/Kg. The concentration of Zn metal in sample A was -0.0048 mg/Kg, and in sample B, it was -0.147 mg/Kg.  

The use of nitrogen-fixing bacteria in agriculture is an effective way to improve soil fertility and overall crop productivity. Bacteria such as Rhizobium, Azotobacter, and Azospirillum are able to extract nitrogen from the soil and convert it into a form that can be absorbed by plants, which is essential for the formation of protein, DNA, and RNA in plants. By utilizing the capabilities of these bacteria, the use of synthetic chemical fertilizers can be varied, thereby reducing the detrimental dampening effects on water quality and the environment. In addition, nitrogen-fixing bacteria improve water use efficiency and contribute to the health of aquatic ecosystems. The use of these bacteria has the potential to improve the results of a more thorough analysis with less cost and less environmental impact.

Microplastics pose a significant threat to aquatic ecosystems and human well-being. This study attempts to conduct a community engagement initiative that focuses on the dangers of microplastics, with the aim of raising public awareness and fostering sustainable behavior change in plastic waste management. Microplastic pollution has become a worrying problem because it has the potential to pose risks to food safety and public health. This study aims to conduct a socialization program on the dangers of microplastic exposure to food safety in the Kertosari Village community. Using a participatory approach, this socialization program involves local communities and students. Socialization activities include informative presentations and interactive discussions to raise awareness of the adverse effects of microplastics on food safety. The results of this community engagement are expected to be a valuable guide for authorities and local communities to raise awareness of the dangers of microplastics and encourage sustainable behavior change towards plastic waste management.