Double Arm Manual Medical Pendant
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How to save feed costs for Penaeus vannamei
First, remove wild fish and reduce the number of competitors.
The pond often contains various wild fish and small shrimp that compete with Pacific white shrimp for food. Some even prey on the shrimp, which can significantly lower feed efficiency. To improve the growth environment, it's essential to eliminate these unwanted species. Before stocking, drain the pond completely and apply lime slurry at a rate of 150 kg per acre when the water level is around 20–30 cm. This helps disinfect the pond and kill any remaining wild fish. Additionally, install filter bags when refilling the water to prevent wild fish from entering again.
Second, focus on selecting the right feed and supplements.
Choose high-quality feed from reputable manufacturers to ensure a balanced formula that supports rapid shrimp growth and minimizes waste. In the early stages of culture, use fertilizers to promote the growth of beneficial microorganisms like plankton and benthic organisms. You can also introduce some live food sources into the pond to reduce the need for artificial feed. As natural food becomes limited, supplement with fresh, pathogen-free live feed and specialized juvenile shrimp feed, gradually transitioning to adult feed. This strategy not only saves costs but also improves overall nutrition.
In the later stages of cultivation, after disease outbreaks, feeding fresh live feed can help avoid major health issues. Depending on local availability, you can use fresh feed to cut down on expenses, but always make sure it’s fresh and free from spoilage.
Third, maintain good water quality.
Water quality plays a crucial role in shrimp growth, color, and feed conversion ratio. Pacific white shrimp thrive in clean, well-oxygenated water. The ideal water color is yellow-green, with a transparency of 30–40 cm and dissolved oxygen levels above 4 mg/L. Regular water changes—about 10–20% every 7–10 days—are important. Apply lime regularly (15 g/m³) every 10–15 days, and use aerators to maintain oxygen levels. Biological agents like photosynthetic bacteria can also be used to naturally regulate water quality.
Fourth, master proper feeding techniques.
Feed small amounts multiple times throughout the day based on shrimp behavior and growth patterns. A common approach is to divide the daily ration into several portions: 30% at 7:00 AM, 10% at 11:00 AM, 40% at 6:00 PM, and 20% at 11:00 PM. Monitoring feed intake is key. Set up bait stations around the pond and check them after 1.5–2 hours. If the shrimp have eaten 60–70% of the feed, the amount is appropriate. Adjust accordingly if the rate is too high or too low.
Feed according to weather conditions. On sunny, warm days, increase feeding; during bad weather, rain, or extreme temperatures, reduce or stop feeding. Also, adjust feed quantity based on the shrimp’s growth stage and health. Feed more when they are growing rapidly and healthy, and less when they are molting or showing signs of stress. Water temperature also affects feeding: feed more between 25–30°C and less when it's below 18°C or above 32°C. Finally, monitor water quality before feeding—feed normally in clean, well-oxygenated water, and reduce or skip feeding if the water is poor or oxygen levels are low.