(B) water injection oxygen. During winter, when there is a lack of water or oxygen in fishponds, water can be diverted directly into the pond. If the oxygen content in the water source is low, the water flow can be subjected to a certain process and drop, and the oxygen content can be increased and then injected into the pond to improve the effect of supplemental oxygen. It should also be noted that excessive iron-containing water cannot be directly injected into fish ponds. After a certain period of gas storms, oxidation, and sedimentation, only a small amount of water can be injected into the ponds. Water injection and supplemental oxygen measures must be taken. Early attention must be paid to prevent shortages. Oxygen and excessive water injection or water injection time is too long, leading to sharp changes in the pond water temperature and a large number of fish swimming. Each time the water injection and the amount of water injection should be based on specific circumstances. To minimize the water injection time, the depth of ice water is generally about 2 meters.
(c) Inflation oxygen supplementation. Use a windmill or other power to drive the air pump to press the air into the hose set under the ice water, attach a filter on the top of the hose, or directly pierce the holes in the hose to let the air diffuse into the water with very small bubbles. Increase air-water contact area and increase dissolved oxygen in water. In some places in recent years, when there is an oxygen deficiency in wintering ponds, they are temporarily caught off guard. They use oxygen cylinders to directly send pure oxygen through the hoses to the water under the ice to allow them to gradually diffuse and perform oxygen supplements.
(d) Chemical oxygenation. For small water bodies such as wintering in greenhouses and overwintering in aquariums, in the event of hypoxia, chemicals may be added for oxygenation and first aid. At present, the chemical oxygenation agents used include ammonium peroxodisulfate, calcium peroxide and hydrogen peroxide. The amount of ammonium peroxodisulfate used was 10 grams per cubic meter of water, and the amount of calcium peroxide and hydrogen peroxide used was 10-20 milliliters per cubic meter of water. The amount should not be too much, so as to avoid damage to the fish.
Feature
Accurate pacing pulse recognition and automatic analysis
Manual, automatic, rhythm, and storage modes
Freezing function: 12 seconds electrocardiogram before and after freezing for back printing
Automatic mode: Review the electrocardiogram 10 seconds before printing, fast/save printing paper
Storage mode: Display parameters and diagnosis are not printed, and electrocardiogram is stored for playback.
AC/DC dual-purpose, built-in large container rechargeable lithium battery
Wide voltage can adapt to 75-265V,50/60Hz AC power supply
12 lead waveform display and 250 case storage (SD card is scalable )
USB and RS232 communication interfaces (ECGNET ECG management software can be selected)
USB host interface supports network transmission, external U disk and USB printer (optional)
High-accuracy thermal printing mechanism, supporting 210/215mm roll paper or 210mm folding paper
Dynamic Ecg,Dynamic Ecg System,Ecg Machine,Ecg Monitoring System
Changchun Yingwang Times Digital Co., Ltd. , https://www.ccsdsm.com