High performance fish farming supplies manufacturer and supplier: Controlling parasites in flowing aquaculture is one of the most long-standing problems of producers of the global community, especially in the systems whose water flow is continuous, i.e., flow-through, semi-recirculating and hybrid RAS aquaculture systems design (Power et al., 2025). This unceasing flow of water is not only vital in oxygenation but also in the removal of waste, which also provides effective routes through which parasites spread to various tanks and production lines. Many parasites possess mobile infective stages adapted specifically to aquatic hydrodynamics, allowing them to exploit water currents as transport mechanisms to reach new hosts (Mouritsen, 2025). As aquaculture becomes increasingly industrialized, the consequences of even moderate parasitic infestations have grown more severe because stocking densities are higher, production schedules are tighter, and biological stress tolerance among cultured species can be easily exceeded (Madsen & Stauffer, 2024). These pressures have made engineering-based parasite control a necessity rather than an optional management strategy. Among the technology-driven solutions available, the combined use of flow-rate optimization and ultraviolet sterilization has emerged as one of the most effective ways to interrupt transmission cycles and stabilize health performance in flowing aquaculture environments (Li et al., 2023).
Environmental compliance and sustainability are prominent advantages of RAS systems. In traditional pond farming, residual feed and feces are directly discharged, causing eutrophication of surrounding water bodies and ecological pollution. Moreover, the scale of farming is strictly restricted by environmental policies. RAS systems treat farming waste through solid-liquid separation and microbial degradation, achieving zero discharge or resource utilization of pollutants, fully meeting modern environmental protection requirements. In addition, the closed farming model avoids the risk of invasive species and cross-infection of diseases, making product quality easier to control and meeting the demands of food safety.
UV strategies are also determined by species and production models. Salmon smolt systems have high requirements of 60-120 mJ since they are prone to protozoans and monogeneans (RK2, 2025). Farms of tilapia, which must operate in warmer and frequently murkier water, use never-ending UV loops with moderate flow-rate modifications. To ensure that larvae are not threatened by zooplankton and bacterial infections, shrimp hatcheries rely on high-dose UV and ultrafine mechanical filtration (FAO, 2020). Twin UV sterilizers are commonly used in marine finfish farms to reduce parasite pressure during the initial stages of production. One of the most effective engineering-based parasite control systems in contemporary aquaculture is the interaction between the optimization of flowrates and UV sterilization. UV neutralizes pathogens prior to their being introduced into the culture units and optimized flow eliminates internally produced infective stages before they can achieve their life cycles. The dual model prevents parasite populations to create self-sustaining cycles and increases survival, feed efficiency, and long-term biosecurity (González et al., 2023).
Conserving resources and ensuring sustainability – In today’s increasingly water-scarce world, the sustainability advantages of flow-through aquaculture systems are becoming increasingly apparent. It enables the recycling of water resources, purifying wastewater generated during the aquaculture process through a series of advanced water treatment technologies to meet reuse standards, thus significantly reducing the demand for fresh water. Statistics show that flow-through aquaculture systems can achieve a water recycling rate of over 90%, requiring only minor replenishment for losses due to evaporation and sewage discharge. Furthermore, flow-through aquaculture systems reduce reliance on land, enabling high-density farming within limited space and improving land use efficiency. This green and environmentally friendly aquaculture method protects the ecological environment and aligns with the concept of sustainable development, laying a solid foundation for the long-term stable development of fisheries. See even more info at fish farming supplies.
In the 1980s, with the initial development of biological filtration technology, land-based recirculating aquaculture systems (RAS) made significant progress. People gradually recognized the crucial role of microorganisms in water purification, and facilities such as biofilters began to be applied to aquaculture systems, more effectively removing harmful substances such as ammonia nitrogen from the water and improving the quality and stability of the aquaculture water. Simultaneously, automated control technology began to emerge in the aquaculture field. Some simple automated equipment, such as timed feeding devices and automatic control systems for aerators, were introduced, initially achieving automation in some aquaculture processes and reducing manual labor intensity. During this period, the variety of farmed species gradually increased. In addition to traditional commercial fish, some shrimp and shellfish also began to adopt RAS models, and the scale of aquaculture expanded, gradually forming a certain industrial scale in Europe and America.
In aquaculture, scaling doesn’t always mean going big. For small and medium-sized farms, success often depends on efficiency, stability, and affordability. Many farmers dream of owning an advanced recirculating aquaculture system (RAS), but the cost can feel out of reach. Even with these guidelines, challenges can arise during system operation. Ozone demand varies based on the growth of biomass, the intensity of feeding, temperature variation, and other unforeseen activities like mortalities. Excessive ozone may lead to irritation of the gills, oxidative stress or immunosuppression of fish (Han et al., 2023). Under-ozonation permits the dissolved organic carbon to build up, moving the microbial communities to a state of instability and susceptible to disease. Mechanical failures in ozone injectors, contact chambers, or degassing systems can cause ozone leakage into culture tanks, resulting in acute stress responses. Many producers therefore rely on automated ORP-controlled ozone dosing systems using real-time monitoring to maintain consistent performance.
