Fish tank heaters are an important part of an aquarium setup because they help to maintain the optimal water temperature for the fish and other aquatic animals in your aquarium. Without a heater that keeps the water the optimal temperature for the fish you want to keep your fish will become stressed, more susceptible to diseases, and may die. Fish tank heaters come in a variety of different types, with each having their own advantages and disadvantages. In this guide on how to choose a heater for your fish tank we will cover the different types of heaters, the pros and cons of each heater, and what heater is best for your tank.
Types of fish tank heaters
Fish tank heates come in four main different types, submersible heaters, hang on the back heaters, in-line heaters, and heating cables. Each type of heater has their own advantages and disadvantages.
Submersible heaters
Submersible heaters are the most popular type of heater out there for a good reason. They are not very expensive, it is easy to set the correct temp and keep it there, and you can put multiple heaters in the same tank.
Submersible fish tank heaters offer a hassle-free and energy-efficient option for fish owners. Because they can be simply dropped into the tank directly without any extra fixtures, they are much easier to install than other types of fish tank heaters. As well, their wattages, sizes and wattage output provide a variety of choices appropriate for different kinds of fish. Their ability to bee fully submerged in water provides more accurate temperature controls while also making them durable and safeguarded from outside elements. It is important to note, however, that submersible fish tank heaters should be picked based on fish species since some fish may be sensitive to their hea t output.
Pros of Submersible Heaters:
- Easy to install: Submersible heaters can be placed directly into the fish tank water, making them easy to install and set up and you can use multiple units if necessary.
- The have Precise temperature control: Being fully immersed in the water allows for more precise temperature control, which is important for the health and well-being of fish.
- They are Energy efficient: Submersible heaters tend to be more energy efficient than other types of heaters because there is no heat loss from outside air interfering with temp control.
- Very Durable: Submersible heaters are sealed and protected from the outside environment, making them less likely to break and more durable than other types of heaters on the market.
- They can be Less visible: Submersible heaters can be easier to hide in the tank making them less visible from outside the aquarium
Cons of Submersible Heaters:
- Compatibility: Not all species of fish are compatible with submersible heaters because these types of heaters tend to have hot spots in the water if you do not have good circulation, so it’s important to make sure the heater is appropriate for the type of fish in your tank.
- Temperature fluctuation: Submersible heaters can cause temperature fluctuations in the tank, which can be harmful to fish if not closely monitored.
- Risk of overheating: Submersible heaters can overheat if not properly maintained, which can be dangerous for the fish and damage the heater.
- Risk of leaks: Submersible heaters are more likely to leak if they are not properly installed, which can be harmful to the fish and the heater.
- Risk of electrical shock: Submersible heaters must be properly grounded to avoid the risk of electrical shock while this is a very rare occurrence there have been reports of this happening.
Hang-on the back heaters
Hang on the back heaters mount to the back or side of the aquarium with suctions cups or a hook over the edge of the tank.
Hang-on-the-back (HOB) fish tank heaters are an ideal choice for those looking for an easy to install heating system for their fish tank. HOB heaters come in a variety of sizes and wattages and can easily be hung on the back of the tank to provide adequate warmth for fish. What sets HOB heaters apart from submersible heaters is that they are positioned outside the tank, yet allow you to access them conveniently for maintenance and temperature adjustment. Furthermore, they tend to be more affordable than other aquarium heaters while remaining reliable in terms of performance. However, one notable drawback is that they are not as energy efficient because they are only partially submerged and do not have as precise with temperature control as submersible fish tank heaters, and can also get damaged if accidentally bumped or scraped.
Pros of Hang-on-the-back (HOB) heaters:
- Easy to install: HOB heaters can be hung on the back of the tank, making them easy to install and set up.
- Affordable: HOB heaters tend to be more affordable compared to other types of heaters since the technology is not as complicated.
- Easy to access: since the heater is out of the water and hanging on the side of the tank, HOB heaters are easy to access for maintenance and temperature adjustment.
- Suitable for different tank sizes: For the small tanks you can always find the wattage you need. HOB heaters come in a variety of sizes and wattages to accommodate different tank sizes and types of fish.
Cons of Hang-on-the-back (HOB) heaters:
- Less energy efficient than other heaters: HOB heaters tend to be less energy efficient than submersible heaters since they are not fully submerged and their can be heat loss outside of the water.
- Not as precise temperature control: HOB heaters can have less precision of temperature control.
- Not as durable: HOB heaters are exposed to the outside environment, and can be damaged by accidental bumps or scrapes this makes them less durable than a submersible tank heater.
- More visible from outside the tank: Since Hang on the back heaters are on the outside of the tank, HOB heaters are more visible than submersible heaters, which can be less aesthetically pleasing.
- Risk of electrical shock: as with any electrical device around water, HOB heaters must be properly grounded to avoid the risk of electrical shock.
Hang on the back heaters can be a viable option for small tanks, while not necessary recommended for large tanks due to their energy inefficiency Hang on the back heaters can be a good choice for the right situation.
In-line heaters
In-line heaters are fish tank heaters that are installed outside the fish tank, typically in a filtration system or sump. They are the most powerful type of fish tank heater available and have the highest wattage, making them ideal for large tanks and heating systems of connected tanks. The biggest advantage to in-line heaters is that they are completely out of sight, providing a more aesthetically pleasing tank setup. Furthermore, since they’re located outside the fish tank they are also less likely to be accidentally damaged due to knocks or bumps. In terms of temperature control, their connection to an accurate temperature probe provides more precise readings than other fish tank heaters. However, their installation and plumbing can be more complicated than other fish tank heater types and therefore more costly.
Pros of In-line heaters:
- Power and wattage: In-line heaters are generally more powerful and have higher wattage than submersible or HOB heaters and are better suited for large tanks or for heating a system of connected tanks.
- Aesthetic: In-line heaters are completely hidden from view, providing a more aesthetic tank setup.
- Durable: In-line heaters are less likely to be accidentally bumped or damaged, as they are located outside the tank.
- Temperature control: In-line heaters tend to have better temperature control as they are connected to the temperature probe which gives a more accurate temperature reading.
Cons of In-line heaters:
- Complex installation: In-line heaters require more advanced plumbing and installation, which can be more complicated and costly.
- Not suitable for all tank setups: In-line heaters are not suitable for all tank setups, such as small tanks or tanks with limited space.
- Risk of leaks: In-line heaters are more likely to leak if they are not properly installed, which can be harmful to the fish and the heater.
- Risk of electrical shock: In-line heaters must be properly grounded to avoid the risk of electrical shock.
- Maintenance: In-line heaters require more maintenance and can be more difficult to access for cleaning and repairs.
- Not suitable for all types of fish: In-line heaters may not be suitable for all types of fish, as some species are sensitive to the heat emitted by these heaters.
Heating cables
Heating cables are a great choice for fish tank heaters in aquariums where plants are included, as they provide a steady, consistent source of heat which helps to promote plant growth and maintain the ideal temperature for fish. The primary benefit of using this type of fish tank heater is that it is placed under the substrate like gravel or sand, creating an even temperature distribution and allowing for much better control than with other forms of aquarium heaters. In addition, heating cables tend to be quite energy efficient and typically have a longer service life than standard aquarium heaters. However, installation can be somewhat more complex because the heating cable needs to be buried beneath the substrate; it must also be done correctly in order to ensure proper functioning and avoid superficial damage to the cable itself.
Pros of heating cables for aquariums:
- Temperature control: Heating cables provide a steady, consistent heat source that helps to promote growth and maintain optimal temperatures for the plants and fish.
- Energy efficient: Heating cables tend to be energy efficient and have a longer lifespan than other types of heaters.
- Natural heat distribution: Heating cables can be placed directly under the substrate, providing a more natural heat distribution and allowing for more precise temperature control.
- Suitable for live plants: Heating cables are typically used in aquariums with live plants, as they provide the steady heat source required for the plants to thrive.
Cons of heating cables for aquariums:
- Complex installation: Heating cables require more advanced installation, as they need to be buried under the substrate, which can be more difficult and time-consuming.
- Difficult to access for maintenance: Heating cables can be more difficult to access for maintenance and repairs, as they are buried under the substrate.
- Less visible in the tank: Heating cables are less visible in the tank, making it harder to monitor the temperature.
- Risk of electrical shock: Heating cables must be properly grounded to avoid the risk of electrical shock.
- Risk of damage: Heating cables can be damaged if not handled properly during installation or maintenance.
Comparison and advantages of each type
| Submersible Heaters | Hang on the Back Heaters | In-Line Heaters | Heating Cables | |
|---|---|---|---|---|
| Easy to install | Yes | Yes | No | No |
| Precise temperature control | Yes | No | Yes | Yes |
| Energy Efficient | Yes | No | No | Yes |
| Durable | Yes | No | Yes | No |
| Visible | No | Yes | No | No |
| Compatibility with fish | Limited | Good | Good | Good |
| Installation cost | Low | Low | High | High |
| Suitable for live plants | Limited | Limited | Good | Good |
Size and wattage
How to determine the size of heater and wattage for a particular tank
fish tank heaters come in a variety of sizes and watts. The size of the fish tank, the type of fish, and the desired water temperature are all important factors to consider when determining the appropriate size and wattage for your fish tank heater.
Your Tank Size: The size of the tank is one of the most im portant things to consider when choosing a heater for your aquarium. A general rule of thumb is to use a heater with a wattage of between 2.5 and 5 watts per gallon of water. For example, a 20-gallon tank would require a heater with a wattage of between 50 and 100 watts.
The Type of fish: The type of fish in the tank also plays a role in determining the appropriate size and wattage of the heater. Some fish are more sensitive to temperature changes and may require a more powerful heater. Be sure to research the specific needs of the fish you plan to keep in your tank before choosing a heater.
The Desired water temperature for your aquarium : The desired water temperature for your tank is another important factor to consider when choosing a heater. Different types of fish require different water temperatures, so it’s important to know the specific needs of the fish you plan to keep in your tank.
Room Temperature: The room temperature also plays a role in determining the size and wattage of the heater. If the room temperature is low, you may need a higher wattage heater to keep the tank warm.
It’s always recommended to consult with a professional or an expert in fish keeping before making a purchase, they can help you to determine the appropriate size and wattage for your tank and the type of fish you’re keeping.
Aquarium Heater Size Chart
| Tank Size | Heat Raise 10 degrees | Heat Raise 20 degrees | Heat Raise 30 degrees |
|---|---|---|---|
| 5 Gallon | 25 Watt Heater | 50 Watt Heater | 75 Watt heater |
| 10 Gallon Tank | 50 Watt Heater | 75 Watt Heater | 75 Watt heater |
| 20 Gallon Tank | 50 Watt Heater | 75 Watt Heater | 150 Watt Heater |
| 40 Gallon tank | 100 Watt Heater | 150 Watt Heater | 300 Watt Heater |
| 50 Gallon Tank | 150 Watt Heater | 200 Watt heater | 2 – 200 Watt heaters |
| 65 Gallon Tank | 200 Watt Heater | 250 Watt Heater | 2 – 250 watt heaters |
| 75 Gallon tank | 250 Watt Heater | 300 Watt Heater | 2 – 300 watt heaters |
| 100 Gallon Tank | 300 watt Heater | 2 – 300 watt heaters | 2 – 300 Watt heaters |
Temperature control
Setting and maintaining the correct temperture for fish in an aquarium is crucial for their health and well-being. The first step in setting the correct temperature is to research the specific needs of the fish you plan to keep in your tank. Different types of fish require different water temperatures, so it’s important to know the specific temperature range that is appropriate for your fish. Once you know the desired temperature range, you can use a thermometer to measure the water temperature and adjust the heater as necessary to achieve the correct temperature. It’s important to check the temperature regularly, especially during the first few days after setting up the tank, to make sure the heater is working correctly and that the temperature remains stable.
To maintain the correct temperature, it’s important to keep the heater clean and in good working condition. The heater should be checked regularly for signs of damage or wear and tear, and any issues should be addressed immediately. It’s also important to monitor the water temperature regularly and adjust the heater as necessary to maintain the desired temperature range.
In addition to the heater, it’s important to consider other factors that can affect the water temperature, such as room temperature and the location of the tank. The tank should be placed in a location that is not subject to drafts or temperature fluctuations, and the room temperature should be kept at a consistent level.
It’s also important to keep in mind that sudden changes in temperature can be dangerous for fish, so it’s important to make any adjustments to the heater gradually, over a period of several hours or days. This will give the fish time to adjust to the new temperature and avoid any stress or harm.
Importance of termperature control
Setting and maintaining the coorect temperuature in an aquarium is crucial for their health and well-being. It is important to research the specific needs of the fish, use a thermometer to measure the water temperature and adjust the heater as necessary to achieve the correct temperature. It is also important to check the temperature regularly and maintain the heater in good working condition. Additionally, you should consider other factors such as room temperature and the location of the tank that can affect the water temperature. Sudden changes in temperature can be dangerous for fish, so it’s important to make any adjustments gradually, over a period of several hours or days. With regular monitoring and maintenance, you can ensure that your fish are living in an environment that is safe and comfortable for them.
Safety and maintenance
How to safely use and maintain a heater:
Using and maintaining a fish tank heat er safely is crucial to ensure the well-being of your fish and the longevity of the heater. To use a heat er safely, it is important to choose a heater that is appropriate for the size of your tank and the type of fish you plan to keep. It is also important to read and follow the manufacturer’s instructions for installation, use, and maintenance. The heater should be properly grounded to avoid the risk of electrical shock, and it should be placed in a location that is not subject to drafts or temperature fluctuations.
To maintain a heater safely, it is important to clean the heater regularly to remove any debris or buildup that can affect its performance. The heater should also be checked regularly for signs of damage or wear and tear, and any issues should be addressed immediately. It is also important to monitor the water temperature regularly and adjust the heater as necessary to maintain the desired temperature range.
It is also important to be cautious when handling the heater, as it gets hot during operation and can cause burns if not handled properly. If you need to replace the heater, make sure you unplug it from the outlet and wait for it to cool down before handling it.
In summary, using and maintaining a fish tank heater safely is crucial for the well-being of your fish and the longevity of the heater.
Tips for preventing accidents and prolonging the life of the heater
It’s important to choose the right heater for your tank and the type of fish, follow the manufacturer’s instructions, and clean and maintain the heater regularly. Additionally, it’s important to be cautious when handling the heater and to be aware of any signs of damage or wear and tear.It’s also important to unplug the heater when you’re not using it, or when you need to perform any maintenance or cleaning. To avoid any kind of electrical hazards, it’s always recommended to follow the safety guidelines mentioned in the manual of the heater provided by the manufacturer.
Additionally, it’s important to have a backup heating plan in case of a power outage or heater malfunction. A battery-operated backup heater or a backup generator is a good option to have in case of a power outage.
By following these safety guidelines and performing regular maintenance, you can ensure that your fish tank heater is working properly and that your fish are living in a safe and comfortable environment.
Popular Brands of Heaters for your fish tank
Overview of popular fish tank heaters on the market:
Eheim: Eheim is a well-known brand in the aquarium industry, known for their high-quality products, including submersible heaters, in-line heaters and HOB heaters.
Hydor
Hydor is another popular brand that offers a wide range of submersible heaters, with different sizes and wattages to suit different tank sizes and types of fish.
Aqueon
Aqueon is a popular brand that offers a range of submersible heaters, with options for different tank sizes and wattages.
Tetra
Tetra is a well-known brand in the aquarium industry, offering a range of submersible heaters with different sizes and wattages to suit different tanks and fish.
Marina
Marina is a popular brand that offers a range of submersible heaters, with options for different tank sizes and wattages.
Fluval
Fluval is a well-known brand in the aquarium industry, known for its high-quality products, including submersible heaters, in-line heaters and HOB heaters.
Jager
Jager is a well-known brand in the aquarium industry, known for its high-quality submersible heaters.
Finnex
Finnex is a popular brand that offers a range of submersible heaters, with options for different tank sizes and wattages. They also offer a range of digital heaters which are known for their precise temperature control and easy-to-use interface.
Cobalt Aquatics
Cobalt Aquatics is a popular brand that offers a range of submersible heaters, with options for different tank sizes and wattages. They are known for their high-quality and durable heaters.
Zoo Med
Zoo Med is a well-known brand that offers a range of heaters for aquariums and terrariums, including submersible heaters, in-line heaters, and heating cables.
It’s always recommended to read reviews and compare the different heaters before making a purchase to ensure that you are getting the best heater for your tank and the type of fish you’re keeping.
Pros and cons of each product
Tips and best practices
In fish tanks that are larger in size or where the temperature of the surrounding room is much lower than what is desired, two fish tank heaters may be needed to ensure proper heating. It’s essential that the two fish tank heaters are put in at opposite ends of the fish tank as this will enable even warming of the water throughout. Installing multiple fish tank heaters also helps to provide a more stable temperature rather than having one heater alone which could cause sudden changes in temperature if it failed or loses power. Avoiding these spikes and drops in fish tank temperature is an important factor for maintaining healthy fish and long-term success with an aquarium.
Having fish can be a very rewarding hobby and making sure the fish are happy and healthy is of greatest importance. An aquarium thermometer is a great tool to have to make sure that fish tank heater (or any other heater you may use) is keeping the fish tank water at the optimal temperature. It’s essential to move the thermometer around in order to check temperature in multiple locations – this will ensure that the water temperature remains uniform. Taking this step will help fish stay happy and healthy and live longer, healthier lives.
A fish tank heater is an essential tool for any fish tank in order to maintain the proper temperature and to keep fish, corals, and other invertebrates healthy. Having it located by the water outflow from the filter ensures optimal heating throughout the whole aquarium. The moving water pushes and then disperses the heated water wherever it needs to go so all parts of the fish tank will be comfortable enough for its inhabitants, giving you peace of mind that all your fish are safe and sound while they explore their environment.
Setting up the ideal fish tank temperature is an important task when taking proper care of fish. Fortunately, fish tank heaters provide reliable and accurate temperature control. Some fish tank heaters come with thermostat controls that have specific temperatures indicated, making them easier to use as you can decide how warm or cool you want the fish tank right away. Other fish tanks require more effort – they have low to high settings without specific numbers listed. No matter which type fish tank heater you end up choosing, it’s always important to double-check that it’s actually keeping the aquarium at the precise temperature!
Having a fish tank heater is essential to the comfort of your fish, but it can also be a danger if not unplugged during maintenance. To prevent overheating of the fish tank heater and ensure that your fish remain safe and comfortable, it is important to never forget to unplug it when draining the fish tank. Failure to do this could result in a damaged fish tank heater, so it is worth taking the few seconds to make sure it is unplugged before you start draining the fish tank. Doing this will enable you to enjoy having fish without worrying about damaging their environment or their fish tank heater.
One of the most important components of your fish tank is keeping a consistent temperature. If your fish tank is located in an area that has external heat sources, such as under an air vent, or near a window that gets direct sun exposure, the room temperature can quickly get too warm for the fish. It is therefore essential to monitor the ambient temperature around the fish tank regularly and use a fish tank heater when necessary to keep temperatures stable. Depending on type of fish and desired temperature range, it may also be necessary to find additional ways to cool off an aquarium that experiences too much fluctuation in room temperature.
Keeping fish healthy and flourishing in a fish tank can be tricky and a fish tank heater is essential. To ensure even heat distributions and prevent too much strain on any individual fish tank heater, it’s best to use multiple units with hang-on and submersible varieties. This way, if one of the fish tank heaters goes out unexpectedly, then the sudden drop in temperature may not be too drastic until you have a chance to get a replacement. It’s also wise to keep a spare fish tank heater on hand just in case for added security.
Proper aquarium heating is essential to fish health and comfort. One factor that should always be considered when selecting a fish tank heater is the length of its tubing. Heat rises, so as a general rule, the heater tube should match the height of your fish tank. If a longer tube is used, then there may be uneven or inadequate heat distribution throughout the fish tank, so an appropriately sized one will ensure optimal heating for your fish and aquatic pets. Paying close attention to the length of your fish tank heater’s tube can make all the difference for your fish and their environment!
Where should I put the fish tank heater in the tank?
The best place for fish tank heater is right next to the outlet from your pump. This will keep the warm water circulating throughout your tank and prevent any hot or cold spots in the tank.
The water current help spread the heated water throughout the whole tank. So ideally placing it where there is good water flow will ensure that your heater always has some water spreading the heat throughout the whole tank.
Frequently Asked Questions
Should I leave my heater on all the time?
Most heaters come with a adjustable heat setting that automatically turns them on and off. You should leave your heater on all the time to make sure your water stays a even tempurature.
What are the most popular brands of fish tank heaters?
Some of the most well-known brands of fish tank heaters include Eheim, Hydor, Aqueon, Tetra, Marina, Fluval, Jager, Finnex, and Cobalt Aquatics.
How do I determine the appropriate size and wattage for my fish tank heater?
The appropriate size and wattage for a fish tank heater depends on the size of the tank, the type of fish, and the desired water temperature. A general rule of thumb is to use a heater with a wattage of between 2.5 and 5 watts per gallon of water. It’s always recommended to consult with a professional or an expert in fish keeping before making a purchase to ensure that you are getting the best heater for your specific needs.
How do I safely use and maintain a fish tank heater?
To use a fish tank heater safely, it is important to choose a heater that is appropriate for the size of your tank and the type of fish you plan to keep. It is also important to read and follow the manufacturer’s instructions for installation, use, and maintenance. To maintain a heater safely, it is important to clean the heater regularly, check it regularly for signs of damage or wear and tear, monitor the water temperature regularly and adjust the heater as necessary to maintain the desired temperature range. It’s important to be cautious when handling the heater and to be aware of any signs of damage or wear and tear.
What are the pros and cons of different types of heaters?
Each type of heater has its own advantages and disadvantages, for example, submersible heaters are easy to install and provide precise temperature control, but they can be less visible in the tank, HOB heatersare easy to access for maintenance and temperature adjustments but can take up space in the tank, and in-line heaters are hidden and out of the way but can be more difficult to access for maintenance. Heating cables are easy to install but can be less precise in temperature control. It’s important to research and compare the different types of heaters to determine which one would be the best fit for your tank and the type of fish you’re keeping.
Can I use a heater with a lower wattage than recommended for my tank size?
It is not recommended to use a heater with a lower wattage than recommended for your tank size. This is because a heater with a lower wattage may not be able to maintain the desired water temperature, which can be dangerous for your fish. It’s important to choose a heater with the appropriate wattage for your tank size to ensure that your fish are living in a safe and comfortable environment.
Can I use a heater with a higher wattage than recommended for my tank size?
While it is technically possible to use a heater with a higher wattage than recommended for your tank size, it is not recommended. A heater with a higher wattage may cause the water temperature to rise too high, which can be dangerous for your fish. Additionally, a higher wattage heater will consume more power which can be more costly. It’s important to choose a heater with the appropriate wattage for your tank size to ensure that your fish are living in a safe and comfortable environment.
Do I need to use a thermometer with my fish tank heater?
Yes, it is recommended to use a thermometer with your fish tank heater to ensure that the water temperature remains within the desired range. A thermometer can help you monitor the water temperature and make adjustments to the heater as necessary to maintain the correct temperature.
Can I use a single heater for multiple tanks?
It is not recommended to use a single heater for multiple tanks, as the water temperature and heating needs can vary between tanks. It’s important to choose a heater that is appropriate for the size and type of fish in each individual tank to ensure that your fish are living in a safe and comfortable environment.
Conclusion
In conclusion, fish tank heaters are an important piece of equipment for maintaining the health and well- being of your fish. Choosing the right heater for your tank is important, and it’s essential to take into account, factors such as tank size, type of fish, desired water temperature, room temperature and safety. It’s always recom mended to read reviews and consult with experts before making a purchase. It’s also es sential to maintain the heater properly, including cleaning and monitoring the temperature to ensure that your fish are living in a safe and comfortable environment. With the right heater and proper maintenance, you can ensure that your fish are healthy and happy in their new home.
