The heating rod is the most commonly used aquarium hardware for the heating of water in a fish tank.

Chinese name heating rod life is generally two years, the heating of the water in the aquarium to form a bimetal

table of Contents

1 Basic analysis

2 construction

3 experience

4 selection method

Basic analysis editor

1. The life of the heating rod: It is recommended to use a normal heating rod for two years. Because his internal bimetal time is long, it is easy to malfunction. After all, it is not very expensive. I am also practical in my heart, so as not to cause unnecessary losses.

2. Whether the glass is good or the stainless steel is good: it is difficult to say, each has its own advantages. Generally, the glass has a low price (except for some special processes), and it can be used in various aquariums. The downside is that it is easy to break. If you use a large aquarium, you must have a protective cover to prevent the fish from getting rotted. The advantages of stainless steel are obvious, firm, durable and look good. However, the disadvantage is that some corrosive environments cannot be used, such as seawater tanks.

3. Quality: In fact, it can be made in China. There is no need to buy imported products, such as Jiabao, Chuangxing, and Silver. I am more supportive of domestic products. The quality of the heating rod can be distinguished from many places. It is not necessarily expensive. There are some expensive glasses that are different for him. The heating wire is different. Some have added explosion-proof performance to avoid glass cracking, etc. If you Not careless, these estimates are of no use to you. A large part of this affects the price of the heating rod, but if the bimetal does not jump, the high-grade heating rod cooks the fish soup faster. There are also stainless steel, many of which use electronically controlled temperature. The temperature of the water is detected by a thermistor. After switching, the control relay or high-power thyristor is used to control the on and off of the heating tube. The accuracy is better than the average. The bimetal is high, but if the thermistor or thyristor is out of order, his heating speed is faster than that of ordinary glass.

4. Repair of the heating rod: If it is glass, the glass is usually broken, so that only one outer casing is replaced. Generally, there is a special glass tube on the market. When changing, please do not put the adjustable screw on the bimetal. Moved, if you don't warm it, you won't be allowed. In addition, pay attention to the seal and do not leak when installing (can be summarized as nonsense). Stainless steel generally has no shave, and it is better to change one if it is broken. If it is outside temperature adjustment, you can find a general appliance repair shop, let them help to see, most of them are thyristor burned.

5. How big is the heating rod? How much is the water volume of the fish tank? One liter of water is better than the 1.5W-2W heating rod. For example, if my tank water capacity is 100 liters, you can use 150W to 200W. of. If a large cylinder, for example, a 300-400 liter cylinder, you should use a 500W cylinder, but try to buy two 300W. This has the advantage that the heating is faster and evener, you can put one on the cylinder. Take a step back. It is said that even if there is a problem, it will not raise the temperature quickly.

6. Experience: If the outer shell of the heating rod is broken during normal use, don't panic, generally don't kill the fish. Just take the electric out and replace it with one. Many netizens are changing the water. When you don't pay attention, you don't break the heating rod. When the water surface gradually drops, it is lower than the heating rod. The heating rod is uneven due to heat, and the outer shell is broken. If there is fish nearby, then. ....... Normal use is generally not bad, it is caused by everyone taking out the water when changing water or cleaning, no power failure, or accidentally hitting a hard place. Be careful to take out the power after a while, otherwise the residual temperature is enough for you.

Construction editor

There are two main types of structures that are currently prevalent in the market.

One is to directly control the temperature with a bimetal. Simply put, a bimetal is placed inside the heating rod. The two sides of the bimetal should be made of different materials. The coefficient of thermal expansion is different. The temperature you set is automatically disconnected. The advantage is that the structure is simple, the price is low, and the work reliability is relatively high. A large part of the difference between the regular manufacturers and the counterfeit and shoddy goods is in this place. The fakes are inferior. After a period of use, they are prone to fatigue, causing the temperature to not jump at the set temperature. The result of the recovery. The downside is that no matter which material the bimetal has an aging period, I suggest that you can change it in 2 years.

The second is to use a thermistor to detect the temperature, and use a thyristor or the like to control the on and off of the heating rod.

1) The thermistor and the heating rod are integrated. This has the advantage that the installation is convenient, there are not many wires, and it looks better. The shortcoming is also because the thermistor and the heating rod are relatively close, which often causes the internal temperature of the heating rod to actually reach the set temperature, and the water temperature in the aquarium does not reach the set stability. As you can see, the heating rod usually stops after a while, and then it will start to warm up after one.

2) The thermistor and the heating rod are not integrated. This has the advantage that the heating is faster, and the thermistor and the heating rod can be placed at a relatively distant distance, so that the above 1) is overcome. Disadvantages. But his shortcomings are also obvious. First, there is a line of thermistor that looks uncomfortable. In case the thermistor is accidentally taken out of the aquarium, huh, what are you doing? The warming, he can't detect it, the consequence is. ...

Use experience editing

The heating rod may be the most commonly used aquarium hardware, and maybe there is no experience to talk about. I will write down my own experience, throwing bricks and jade, please advise.

1. There are too many brands of heating rods, and now the quality of domestic production is relatively good, such as innovation, silver sound, etc., imported such as Lei Wolf, Jijia. The heating rod has a service life and generally does not exceed two winters. After a long time, the wires are aging and the contacts are oxidized and may fail. Even if the imported heating rod, the life expectancy stated in the instructions is within 1-2 years. For the sake of safety, the heating rod and the thermostat can be used in combination. There are many brands of domestic thermostats, and the price is not high. Set the temperature of the heating rod to 2 °C higher than the temperature controller, so double insurance can avoid the tragedy of burning fish soup.

2. The power selection problem of the heating rod: Generally, according to the volume of the cylinder, there should be 2w heating power per liter of water. If the water in a cylinder has 300 liters, the total power of the heating rod is at least 600w. Winter heating is probably the most energy-intensive expense. I strongly recommend that you do a good job of keeping your tank warm. Buy a few 2 cm thick foam boards, stick the back and sides of the tank, and make a well-sealed lid on the fish tank to greatly reduce energy loss. It takes only a little time and a small amount of money, but it can save a lot of electricity bills. Why not? We must know that every penny paid is our own labor remuneration. Why can't we go through with our own wallet?

3. Placement of hot rods: When raising large fish, the heating rod should be fixed firmly, because some big fish can easily hit the bottom of the cylinder and break it. Do not bury the heating rod inside the sand and do not touch the glass directly. There used to be a fisherman who broke due to uneven heating of the glass due to the direct contact of the heating rod with the glass. If the heating rod is placed diagonally or flat, the heat dissipation effect is better, although this may not look good. Because the heated water is rising, the rod placed vertically, the temperature difference between the hot water generated in the lower part of the rod and the upper part of the rod is relatively small, and the heat conduction is slower, which undoubtedly reduces the heating efficiency, prolongs the heating time, and wastes energy. For the more clumsy fish like rainbow, it is best to add a sleeve to the heating rod to prevent the fish from being burnt. If there are two heating rods in the cylinder, try to separate them on both sides of the cylinder and heat them evenly. The thermometer should be placed farthest from the heating rod, so that the water temperature obtained is not from the hot water just heated.

4. It is best to have a spare heating rod in your home. Otherwise, if the stick is broken at night, you don't have to jump.

5. The red light of the heating rod does not indicate that the working condition is good. The water temperature should be taken as the standard. Because if the resistance wire is broken and the water temperature drops, the bimetal turns on the circuit, but it does not heat, so the red light is on for a long time. Of course, sometimes the temperature is reached, the metal piece is not broken, and it is possible to continue to rise in temperature. This will also be manifested as a red light.

According to the experience of using tropical heating rods for many years of tropical fish!

1: The length of the heating rod is as long as the height of the fish tank water level is allowed to be as good as possible! Because the longer the heating rod, the more the heating surface! The more faces of heat exchange! The shorter the heat exchange time!

2: Also, if your fish tank uses a 300W heating rod to meet the requirements of aquarium heating, then I suggest you use two 150W or 200W heating rods so that it does not appear in the case of only one heating rod. If the heater is faulty plus the tragedy caused by your negligence! Preparing two heating rods is to ensure that the temperature requirements of your fish are guaranteed by the fact that the two heating rods will not fail at the same time! The power consumption of two 200W heating rods is similar to that of a 300W heating rod! (In the case of the same ambient temperature and insulation) I have specially tested it with a power meter!

3: The heating rod brand is also a very controversial issue:

Some people think that imported goods such as Thunder Wolf have high precision and long service life for constant temperature control (there are still good use of fishermen for 6~7 years), others think that it is more energy-efficient, of course, the price is also. . .

In addition, some people think that the difference between the power consumption of the imported heating rod is also very small (1 month can save a lot of electricity?). From a reliable point of view, a more than 100 imported heating rods can buy 7, 8 domestic brands (such as Yinsheng), even if the imported goods can be used for 5 or 6 years (do you rest assured?), not as good as Domestic one year is a reliable one. From a safety point of view, 15 yuan plus a 40 yuan cylinder external thermostat, safety is no matter how much the heating rod's single temperature control is comparable! ! ! In fact, the expensive and cheaper heating rods are mainly distinguished by the accuracy of the constant temperature control, but this can also be compensated by an external thermostat. Therefore, the rational analysis should be to use a 15 yuan heating rod, plus a thermostat.

Regardless of imported or domestically produced, it is best to buy a brand that everyone recognizes, and do what you can.

How to choose a heating rod

The temperature of the aquarium is crucial, and the task is on the heating rod. Find some information for everyone:

Safety advice

Do not energize the heater before it enters the water. The heater heats up extremely quickly in the air. If you are not careful, you may burn your hands and it will be broken when the temperature is high.

Your child may be interested in the knob on the thermostat. If the knob does not have a protective cover, after adjusting the temperature, the knob can be removed.

The heater is a device that must be purchased to raise tropical fish.

For the northern part of the country where the winter is very cold, the heater should also be prepared for the goldfish. Otherwise, temporary negligence, such as the temporary suspension of heating, will cause unnecessary losses.

Aquarium heaters do not cost much, because tropical fish have a natural temperature of 24 to 28 ° C. The power consumption is not high enough to maintain a suitable temperature. Once the temperature reaches the required level, the power consumption is even less.

Most of the heaters used in the home are single small heating elements. There are many varieties to choose from in the market, and there are many thermostatic control devices that are safe and reliable to use. Another benefit of the heater is that it is used to treat sick fish or to provide higher water temperatures for some fish to promote their reproduction.

Type of heater

Resistance wire heater

The wire is wound around the ceramic tube and placed in a heat-resistant, waterproof glass tube. The wire is connected to the power supply via a waterproof sealant cover. Common specifications are 50, 75, 100, 125, 150, 200 watts, which can be directly immersed in water.

Outboard heater

There is now an outside heater, just like an electric blanket, which can be heated by putting the aquarium up, which is more expensive. It seems that the promotion has to be improved.

Low voltage heating

This is a safer method than the above heating method. But it needs to be equipped with a transformer, the volume is also large, and it is rough in the aquarium, which is not good-looking.

Selection method editing

To select a heater, the problem of power matching must be considered. Generally speaking, 10 watts of power is required for every 5 liters of water. For example, an aquarium 90 cm long, 30 cm wide, and 38 cm deep with a volume of 100 liters should use a 200 watt heater. For larger, 90 or more aquariums, two 100 watt heaters are required and placed at the ends of the aquarium so that the heat is even and the effect is better.

Nowadays, small aquariums also have high-powered heaters, but if the performance of the heaters is not good, the danger is very high, especially when the heater is in an abnormal "work", the water will heat up very quickly. Even boiling and smoldering your fish, high temperatures can cause the glass jar to burst.

Moreover, the smaller the aquarium, the faster the temperature changes. If the heater is too large, it will start and stop frequently, which will easily damage the thermostatic control components and cause the heater to malfunction. Conversely, large aquariums with low-power heaters can only reach their maximum load, and when the ambient temperature is too low, it is useless.

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