Knee Warmer is using batteries as power supply, to reduce pains of the knees. It provides stable heat penetrating so as to relax fatigue caused to the knees.
It is always with velcro for fastening better, which also enhance the heat therapy effect, as it touches better to human knees.
Below picture for reference, it can be made in different shapes and designs.
Knee Warmer Knee Warmers for Arthritis, Specialized Knee Warmers, Electric Knee Warmer, Thermal Knee Warmer Ningbo Makeheat Electrical Appliance Co., Ltd , http://www.makeheat.net
First, preparation before winter
1. Clearing ponds should be prepared before and after October each year for wintering of disinfected fry. The size of overwintering area should be selected according to their own actual conditions. It should be selected as far north as possible, with convenient drainage and irrigation, with an area of ​​1 mu or more and a water depth of 80 cm or more. The pro-fish ponds should be larger, generally more than 5 mu, with a water depth of 1.5 meters. Prepare stocking ponds for wintering seedlings. Before the fish is released, clear ponds should be disinfected. It is best to put dry water and let it dry for more than 15 centimeters of mud during a week (wash out with a mud pump or running water or pick it up outside the pond. ). Clearing ponds in the wintering ponds are also disinfected with the same fry before other seasons. Lime, tea bran or strong chlorine (bleaching powder) can be used for spilling. It is mainly to kill viral bacteria, miscellaneous fish and other natural enemies. Note: Tea bran should be crushed, soaked for 2-3 days, then boiled with boiling water, and then stir well, even the scum with Quanchiposa juice. Lime and strong chlorine powder (bleached powder) splashed in the whole pool after being mixed with water.
2. Preparation of fish species Stocking species for overwintering fry should be adapted to local conditions to suit their pond conditions and market needs. If the pond water temperature is maintained above 12°C and the water depth is maintained at more than 1.5 meters, consider warm water fish such as wild pheasants, earthworms and tilapia. If you don’t have safe wintering in stocking salmon in previous years, warm water fish need not be considered. Under normal circumstances, the average water depth is more than 1.2 meters per mu.
Second, enhance the body composition of overwintering fish and improve its ability to overwinter
1. Raise the fullness, intensively feed before wintering, increase fat accumulation, and raise one month before the winter is a crucial period of safe wintering. It is called “fattening periodâ€, and it is a good breeding period for raising fish. There is a certain degree of assurance of safe wintering, so feed until the fish ceases to feed until winter.
2. Selecting and cultivating good varieties that are cold-tolerant: The alpine region should have a plan to select and cultivate varieties that are able to adapt to cold environmental conditions and have a relatively strong wintering ability.
3, strictly abide by quarantine and disinfection measures. To ensure that the wintering fish are healthy and free from injury, strengthen the pest control work before wintering, and fish that do not meet the requirements for overwintering should be handled separately. Fish species with small specifications and weak constitution should not be put into running water or have more harm to the enemy. In the annual waters, when entering the overwintering pool, drug toxicity must be applied to prevent the spread of fish disease during wintering.
4. When going out of the pool, entering the pool and transportation, it is necessary to exercise care and try to avoid damage.
Third, to improve the environmental conditions of fish overwintering and improve the survival rate of overwintering.
1. Carefully choose the wintering waters: There should be less silt, strong water retention and easy fishing, there are pools, water depth is more than 1.5 meters, and the water quality is suitable for wintering conditions.
2. To improve and create a good wintering environment, the snow on the ice surface of the pool must be cleaned at any time to maintain clear ice, and it has a positive effect on biological oxygenation.
Fourth, reasonable arrangements for fish safety wintering decided to put fish in overwintering units, mainly based on the water temperature, the length of the ice-sealing period, the amount of dissolved oxygen in the water; the type of fish and individual size; effective winter water surface size and management measures, etc. Special attention should also be paid to the seepage situation in wintering ponds, other factors for oxygen consumption, and the effects of specific factors such as the water supply and oxygen supplementation conditions that can be taken:
1. The overwintering pool is more than one meter high and the density is 0.5-1.0kg/cubic meter.
2. The water-stopping wintering pool with water-supplying conditions can have an effective wintering depth of 1 meter and can be overwintered by 0.5kg/cubic meter.
3. The water-free wintering pool without water supply conditions can effectively take oxygen supplement measures in the event of lack of oxygen. The effective wintering water depth is 1 meter and can be 200-300 g/m3 over winter.
4. For wintering in greenhouses, the general density is 3 to 5 kg/m3. Everywhere in the arrangement of wintering density, it is necessary to master according to the actual situation. Wherever conditions permit, broodstock, fingerlings, and different types of fish are preferably wintered separately so that different wintering measures can be taken. The time spent on wintering is also determined according to local conditions.
Fifth, to strengthen the management of fish during the overwintering period Wintering is the central task of fish farming in winter. It is necessary to conscientiously strengthen the management during the wintering period, be responsible for special personnel, and establish a post responsibility system;
1, during the entire wintering of fish, must be based on water, with oxygen as the premise, to strengthen the management of special personnel, it is particularly important to constantly monitor the water quality of the wintering pond, keep abreast of changes in water and dissolved oxygen, normal water It is colorless or pale yellow and odorless. When the color of water gradually turns to blue or dark brown, the water quality is turbid and there is a foul odor, which is a sign of deterioration of water quality. Effective replenishment and oxygen supplement measures should be taken in time.
2. It is necessary to regularly measure the depth of water and the thickness of ice, especially if the water stops flowing through the winter pool. When it is found that the water level drops seriously, it is necessary to refill the new water in time.
3, in the early winter or the end of the season can be fed according to local conditions.
4, for the wintering pond levees, fish blocking foil, injection outlets and gates, etc., should be checked daily and found damaged or leaking. To deal with it in time. Keep the flow rate stable throughout the wintering period, not due to lack of oxygen or the need for medical treatment. Generally, do not change the flow of water in a casual manner. A drastic change in flow rate is unfavorable for the overwintering of fish.
5. It is forbidden for cars, horses and pedestrians to walk around on the winter ice field. It is not advisable to let off the guns near the wintering ground so as to avoid shocking the fish.
6. Prevent all sewage from flowing into the wintering pool.
Six, disease prevention and treatment: Overwintering fry and fish most susceptible to bacterial gill disease in the early winter, suffering from parasite-induced fish disease before the spring, when the water temperature 15 °C -25 °C when suffering from small echinococcosis or scraping fish After suffering from hydromycosis.
1. Preventive measures: 1 Be careful to minimize fish injuries. 2 When the number of fry is too large, dip the fish fry for 10-15 minutes with 0.5 -0.6 saline or dip the fish with 0.1 g of potassium permanganate solution per cubic meter for 5-10 minutes, and then put it in the pond. (3) Every 20-30 days, splash lime once, and use 15-20 kg/mu/m, splashing water in Quanchipi. 4 Use tea bran (whole and should not be broken) 7-8 kg/mu/m, place it in the corners and in the middle of the pond, let it dissolve slowly, and play the role of disinfection and regulation of water quality. 2, treatment: 1 bacterial gill disease. Symptoms: The diseased fish has a dark body color and travels alone. The lids are opened. There are many mucus on the silk, and some decay into a "open skylight" shape. This is a typical bacterial gill disease. At this time, the pond water body can be disinfected with quicklime (25kg/mu/m), and the next day, it should be spilled with half a catty of trichlorfon (crystals) plus 2 coarse salty water (1 meter deep per acre). At the same time, with compound fish drug feeding for 3-6 days. 2 small melon worm disease. Popular in water temperature 15 °C -25 °C, the symptoms: sick fish swim slowly, floating on the water, sometimes the cluster around the pool, check the sick fish fish, fins, chin, there are many small white spots. At this time, each mu of water depth is 1 meter can be used half a catty dried chili and 2 two dry ginger pieces, with 4 catties of water boiled for half an hour, then even the slag with juice Quanchiposa, for 2 consecutive days, once a day, can be achieved The desired effect. 3 Other fish diseases caused by parasites. It is mainly in the late winter and early spring, when there are large individuals and poor water quality, such as trichoderma, hidden whipworm, pupa tuberculosis, etc., then the buckwheat seeds and leaves can be used to drown water, and the water depth per mu is 40 kg. About to tie into, piled up near the inlet, can achieve the purpose of prevention, can also be used copper sulfate, ferrous sulfate mixture, 0.5PPM and 0.2PPM water after Quanchiposa. 4 hydromycosis or mold mildew. Mainly caused by mechanical injury or frostbite, the diseased fish is sluggish, and there is a mass of cotton-like substance on the fish. If it is not treated, it will slowly fail and die. At this point can be used four times a minute baking soda and four-thousandths of salt mixed with water solution Quanchiposa or 0.1PPM potassium permanganate solution Quanchiposa, 2 times in a row, once a day can be.
VII. Shortening wintering time The survival rate of winter fishes has a direct relationship with the length of wintering. The wintering period should be shortened as much as possible. Late entry into the pool and early pooling should be implemented. Attention should be paid to early feeding when the wintering pond cannot be used in time.
Winter management of fish
Because the fish's metabolism is closely related to the water temperature, their growth is mainly in the summer and autumn, and in the winter, due to the lower water temperature in the pond, the fish activity is reduced, the fish eat less, the metabolism is very slow, and the growth rate It will also be slow, coupled with natural consumption, the fish will be reduced; plus fish ponds are often contracted for a period of time, so this time most of the adult fish must be on sale before winter, leaving wintering fish It is mainly fry or broodstock. The over-winter problem of farmed fish is an important part of the fish production process. How to ensure the safe wintering of fingerlings and broodstock is a key issue for the sideline of fish farming, so it is necessary to determine the correct method and measures for safe wintering of fish culture and wintering of fish. The security measures will take effective wintering measures in accordance with the specific conditions in each place and the overwintering experiences and problems in the past years. We now sum up the following aspects in our experience and measures that have proven effective in the winterization of fish safety: