In winter, the water temperature is low, the illumination is low, the phytoplankton in the fish pond water is low, and the oxygen production capacity is poor. The fish are relatively weak because they stop feeding. In order to ensure the safe growth of fish in winter, water quality regulation and management in winter fish ponds should grasp the following techniques: 1. Thoroughly disinfect winter fish ponds for thorough disinfection. If there is no fish in the pond, the dry pool should be disinfected, and the whole pond should be splashed with 75-100 kg of lime per acre. If there are fish in the pond, the water must be disinfected. The pond is about 1 meter deep with about 150 kg of lime slurry per acre. If the density of fish and pond overwintering is high, 20~30kg of lime slurry per acre will be splashed in Quanchipia, or 1g of bleached powder will be spilled in each cubic meter of water. If the amount of zooplankton in the water is too large, 90% of crystals of trichlorfon 0.4 g Quanchiposa can be used per cubic meter of water. 2. Maintaining deeper levels of water in winter is less likely to cause lower water levels in fish ponds. In addition, some fish farmers like to shallow the fish pond water, thinking that shallow water can make the fish reach the sun for heating purposes. In fact, the winter pond water is shallow, the water temperature changes quickly, and the temperature difference is large, which is unfavorable for fish growth. After the water level drops, the fish population density increases accordingly, and it is easy to cause lack of oxygen and stop the fish from growing or even die. Therefore, to ensure the safety of fish over winter, the pond must maintain a deeper water level. The water depth in the southern region should be 1.5 to 2 meters, and the minimum should be no less than 1.5 meters, which is deeper than the water level. The water depth in the northern region should be between 2 and 2.5 meters and the minimum should be no less than 2 meters. Below this level, the water level should be deepened in time. 3. Appropriate fertilization pond fertilization should be based on the transparency of the water to master. If the transparency of the water is about 30 centimeters, it shows that the water body is thin and moderate. If the transparency exceeds 45 cm, the body of water is too thin. If it is a pond in ponds, inorganic fertilizer should be applied. The application rate depends on the transparency of the water body. If it is empty pond, 150-200 kg of manure excrement per acre shall be used as basal fertilizer after disinfection in the pond. 4. Strengthen routine management In the winter, we must insist on frequent patrol ponds, observe the changes in water color early, mid and late, and make the pool water “fat, live, tender, and coolâ€. Regularly (10-15 days) infuse new water and discharge old water. . If it is found that the water quality is discolored, cloudy, darkened, and has rancid odor, indicating that the water quality has deteriorated, it is necessary to replace the new water in a timely manner and increase oxygen properly. The quick lime can be splashed every 20 days. Each time, the lime is 10 kilograms in water with a depth of 1 meter per mu. The quicklime has the function of clarifying the water quality and improving the transparency of the water body, thereby increasing the amount of sunlight injected into the water body, which is beneficial to improving the water photosynthesis capacity. If fish ponds are found to be frozen at ice eyes, they need to be able to break the ice in time and add new water or use other methods to increase oxygen.
The Expandable Circuit is non-rigid tube used to convey gases or vapors between components of a breathing system. It`s mainly made of EVA material, extremely flexible, kinking resistant, very high quality. The tube is expandable, easy for transportation and use. It can be assembled with water trap, anaesthesia mask, Breathing Bag, BV filter, HMEF and so on, to fit with various needs. Thus, there are different models according to the assembled accessories and tube length.
Ø 1 set of circuit include:4 tubes,2 straight connectors,1 Y-connector,1 elbow connector with luer cap,2 watertraps
Ø size:Adult(ID 22mm), Pediatric(ID 15mm), Neonate(ID 10mm)
Ø Length:0.5-3 meters,any length customized
Ø Tube type:Corrugated,Expandable,Smoothbore
Ø Optional spare parts:Anesthesia mask,Breathing bag,BVF/HME filter,catheter mount,extra limb,sampling line,suction tube,airway cannula,etc.
Expandable Breathing Circuit,Medical Anesthesia Devices,Dual Limb Breathing Circuit,Expandable Anesthesia Circuit Hangzhou Trifanz Medical Device Co., Ltd , https://www.cfzmeds.com