The Best Pond Heaters of 2021


Pond owners have a lot of concerns while caring for every fish in the pond. Their topmost concern is the safety and well-being of all the aquatic animals. Whether you are a beginner or an expert pond owner, you know that some situations may affect the lives of your fish whenever the seasons change. Winter season makes not only people but especially animals struggle, including aquatic animals. To keep your fish safe throughout the winter, consider having the best pond heaters that can prevent ice from forming over the pond surface. These are reliable devices that provide warmer water in the pond and help the fish survive.

What is the Best Pond Heater

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Top 8 Best Pond Heaters Reviews

1. Farm Innovators Submergible Pond De-Icer 1500 Watts


In both small and large ponds, placing a pond heater is essential for the survival of your fish during winter. The Farm Innovators Submergible Pond De-Icer is one of your top picks when it comes to pond heaters or de-icers. As a pond de-icer, your pond will be free from ice, which is good for your fish.

One of its impressive features is being thermostatically controlled. It means it operates only when necessary. The design of this unit is even more awesome. When you place it at the bottom of the pond, your fish won’t notice it.

With a sturdy cage, it can last for a long time if you maintain it. It is also safe to use in plastic tanks. It may not be energy efficient, though, because it requires high power consumption. But for the safety and survival of your fish, you can consider having this device in your pond.


  • Thermostatically controlled
  • Protective sturdy cage
  • Submergible
  • Safe in plastic
  • Designed to be unnoticed


  • Not energy efficient

2. Farm Innovators Cast Aluminum Floating Pond De-Icer 1250 Watts


As a pond owner, you can’t allow your pond to freeze. If harmful gasses can’t escape due to the build-up of ice, it can kill both your fish and the plants in the pond. You have another option that could maintain a small vent hole in the ice. It is the Farm Innovators Cast Aluminum Floating Pond De-icer.

The use of this unit won’t harm the plants and fish in your pond. A fully grounded 10-foot supply cord is included in the package. This device is also thermostatically controlled, which allows it to run automatically.

But take note that it works best in ponds with a capacity of 200 to 600 gallons. The device is also made of patented cast aluminum that makes it more efficient and safer to use. Additionally, it fits all types of ponds.

Prepare for a higher bill, though, because of its high wattage. Any device with a high wattage means high power consumption.


  • Efficient for up to 600 gallons
  • Thermostatically controlled
  • Fish and plant-friendly
  • For all types of ponds
  • Patented cast aluminum material


  • High power consumption

3. Allied Precision Floating De-Icer 1000 Watt


If you have a pond with a capacity of 70 to 100 gallons of water, the Allied Precision Floating De-icer is suitable for your pond. It is a safe and useful heating device with a buoyant enclosure and impressive durability. This unit could also withstand the elements and will remain floating in all conditions.

It is designed to float at the surface of the water for a long time without sinking. And with a stainless-steel heating element, it prevents rust and corrosion from damaging the device.

The package even includes a 6-foot anti-rub power cord. You don’t have to doubt this unit because it is both CSA and UL listed. It shows that it is of high quality and a reliable de-icer.

With an energy-efficient operation, even your stock tank will be free from ice without overheating. Though the use of this unit would result in high power consumption, it is still one of your best picks. When you choose to buy this unit, the metal guard is sold separately.


  • Energy-efficient operation
  • Has buoyant enclosure
  • Stainless steel heating element
  • Has an anti-rub power cord
  • CSA and UL Listed


  • Metal guard sold separately

4. K&H Pet Products Ultimate Stock Float Pond Heater 750W


With a wheel-like design, the K&H Pet Products Ultimate Stock Float Pond Heater offers an efficient way to keep the water pond free from ice. If you have winter stock tanks, this device is safe to use. You won’t see any damage to your liners or plastic tanks.

As a thermostatically controlled unit, it turns on and off automatically when needed. Note that the device maintains a temperature that is only above freezing. It means you can’t adjust it to higher temperatures.

With only a click of a button, the device can either float in water or be submerged underwater. And in the package, it includes a full cage and cord clip. Both accessories secure the pond heater.

Cleaning and maintaining it is easy. If you think this is the right choice for your tank size and weather-zone, then be impressed by its features. With its wattage, it is suitable for more than 100-gallon of water.


  • Safe for all stock tanks
  • Thermostatically controlled
  • Full cage included
  • Free cord clip included
  • Easy to clean and maintain


  • Temperature cannot be adjusted

5. Laguna Power Heated De-Icer for Ponds 500 Watts


The Laguna Power Heated De-icer keeps an area in your pond thawed, and open. It is suitable for ponds with a temperature of 20 degrees Fahrenheit and below. Whether you have a plastic or liner pond, this de-icer is safe to use.

The plants and fish in your pond will also be safe when you place it on the surface of the pond. It comes with a LED light, which is an indicator that the unit is heating.

The device also has a high impact resistance due to the material used, which is stainless steel. With its dual-zone integrated thermostats, it allows an efficient heat distribution.

After using it during the winter season, store the device indoors. The use of extension cords for this de-icer is not recommended. It could last for years if you maintain it and follow the tips in using it. Additionally, you can even save your budget.


  • Equipped with LED light
  • Stainless steel material
  • Safe for plants and fish
  • Safe for plastic and liner ponds
  • Has dual zone integrated thermostats


  • Extension cords are not allowed

6. Tetra Pond Heater 300 Watts


The Tetra Pond Heater works well in winter and prevents an area in your pond from freezing. Like other de-icers, this unit is also thermostatically controlled. It automatically shuts off when you don’t need it.

It includes a natural finish stone that perfectly complements your pond and its surroundings. The device is highly efficient in temperatures as low as -20 degrees Fahrenheit.

The package also includes a 15-foot power cord. With a size of 300 watts, it requires a lower power consumption compared to other pond heaters or de-icers. As a UL listed, it is highly efficient and reliable.

Your pond fish will stay healthy throughout winter by placing this device in the pond. It only operates by plugging it in a power outlet and does not require the use of batteries.

It is a floating device and is well-known for its durability. When your pond starts to freeze, you can place it somewhere the pond’s surface.


  • Thermostatically controlled
  • Effective to -20 degrees Fahrenheit
  • Has a natural finish stone
  • UL listed
  • 15-foot power cord included


  • Lasts for 2 to 3 years

7. K&H PET PRODUCTS Pond Heater 250 Watts


Safe and efficient, this pond heater is perfect for liners or plastic tanks, even for buckets and pails. You will not see any damage to your properties when you use the device. As a MET listed, you can trust its safety.

Controlled by thermostats, the unit will automatically turn on and off when necessary. It keeps the water from freezing during winter months. Though it could maintain a tank temperature of just above the freezing point, you can’t adjust it to higher temperatures.

It comes with a full cage and a free cord clip. It is to secure the pond heater and to prevent other animals from reaching the power cord. If you want it to last for a long time, you must clean and maintain it regularly.

Additionally, always keep the device in the water. Make sure to submerge the heating element for a successful operation.


  • Safe for buckets and pails
  • Thermostatically controlled
  • Low wattage
  • Submersible
  • Full cage and cord clip included


  • Temperature can’t be adjusted to higher temperatures

8. DANNER MANUFACTURING Pond De-icer 120 Watts


The Danner Manufacturing Pond De-icer is a perfect option for those looking for an extremely energy-efficient unit for their small pond. With only 120 watts of heating power, you can expect a low power consumption.

The unit has a corded electric power source type and does not require the use of batteries. With thermostatic control, it reduces the heating time. It means you can also save electricity.

It has an 18-foot grounded power cord and is safe for flexible liners or preformed ponds. The power cord is quite long when compared to that of other pond heaters. But if your pond is not close to a power outlet, you can use an extension cord.

If you live in an area that experiences long-term icing of pond surfaces, you can rely on this device. It emits a subtle heat, which won’t harm your fish. And they would love the unit and will even enjoy hanging out underneath it.


  • Energy efficient
  • Thermostatically controlled
  • Has 18-foot grounded power cord
  • Safe for flexible liners or preformed ponds
  • Saves electricity


  • For small pond use only

Pond Heaters Buying Guide 

If you have invested much of your time and money for your fish pond, then you can’t lose your fish in winter. And if you have made up your mind to buy a pond heater, read on this buying guide. It will help you decide which is suitable for your pond. The cost, size, quality, and features are among the necessary things for you to consider in picking up the right model.

Running Cost

A pond heater consumes a small amount of electricity. So, its running cost is also low. But it still depends on the wattage of the unit. If the wattage is high, then it will consume more energy, which means you will spend more money on your electric bill.


The size of your pond will tell you the required size of the pond heater you will need. If you have a small pond, you can choose any size that you want. But for a large pond, consider buying multiple pond heaters.

And if you are in a place where the water even in your pond almost turns into ice, you may consider buying a unit with a higher wattage. Though it requires high power consumption, it is efficient in speeding up the process of heating.


Whatever product you want to buy, one of the top things you need to consider is the quality. It is the same when choosing the right pond heater. You can check on customer reviews and ratings to confirm the quality of the pond heater that you want to have.


Before buying a pond heater, it’s also a great help to consider its features. When you check its features or technical specs, you will have an idea of what you prefer for your pond. The specs include the wattage, material, weight, size, and dimensions of the pond heater.

What is a Pond Heater?


Pond heater, also known as de-icer, is a necessary device installed in a pond. It could be floating or submerged underwater. During the winter season, the build-up of ice is a primary concern of pond owners. Placing this device in your pond is an efficient solution to prevent even the build-up of gas within the pond.

How does a Pond Heater Work?

Some of you have probably thought that by using a pond heater, the water in the pond will completely become warm. However, it is not the case. The device only heats an area until a hole in the ice is created. And through that hole, harmful gases within the pond water could escape.

Most pond fish struggle every winter. The fish in the pond will be in danger if gases are trapped underwater because of the build-up of ice on the pond’s surface. You must keep the device on to maintain the hole.

Though not all pond owners need a pond heater, it’s a great help to those living in an area that experiences winter. You will need a power supply since this device operates using electricity.

If you want a floating de-icer, you only must place it on top of the ice and turn it on. And if you prefer the submersible type, place it at the bottom of the pond.

Types of Pond Heaters

Like other devices that are necessary for every fish pond, you can’t neglect to place a heater in your pond. But first, consider the factors in choosing the right pond heater for you to have. Though there are many water heating solutions out there, it’s good to have the best. Check on the following different types of pond heaters, so you will know which one is fit for your pond.

Pond De-icers

A reliable water heating solution, pond de-icers, keeps the pond water free from ice. It is the most common type and is designed to float on the water’s surface or be submerged underwater. The water in your pond can breathe since gas exchange can finally take place. If you have fish that could hardly withstand the cold winter, then don’t hesitate to install this heating device.

Inline Electric Water Heater

The temperature of water in the pond is a necessary factor to consider for the survival of your fish. By using this type of pond heater during winter, it effectively warms the water. The cold water from the pond enters the heating chamber and comes out to be slightly warm.

Gas-fired Boiler

This type of pond heater comes with a heat exchanger. Compare to the Inline Electric Water Heater, the water that is heated does not come from the pond but within the heating system. Though the process of heating seems complicated, it is still highly efficient and beneficial. It is a perfect option for a koi pond.

Why do You need Pond Heater?

Winter affects the survival of many pond fish. When the ice starts to form in the pond, filters won’t function properly. And when that happens, there will be less oxygen in the water that endangers your fish. The following are some of the reasons why you need a pond heater.

Fish Survival – Warm water would help the pond fish survive the cold winter. Although some fish can handle cold temperatures, you will still need a pond heater that could guarantee the survival of your fish.

Prevents Ice Formation – The use of pond heater prevents ice from forming in the pond’s surface. Although more oxygen is available in cold water, ice shouldn’t fill the surface of the pond. When the pond is clear from ice, the water can easily absorb oxygen.

Gas and Air Exchange – Though a pond heater can’t make the entire water pond warm, the water won’t freeze completely. It keeps a small area warm where the process of gas and air exchange takes place.

More Resistance for Fish – With pond heating, your fish will grow healthy. Pond fish won’t suffer from bacterial infections if their resistance is strong. You can help your fish get through the cold winter by installing a pond heater.

Frequently Asked Questions


How to clean pond heater?

Quality pond heaters or pond de-icers could last for years, especially if these devices are well-maintained. If you want your pond heater to run efficiently for a long time, then do some regular cleaning. The device won’t experience premature failure if you don’t ignore the lime deposits on the heating element. Inspect it regularly and use water or a limescale remover when you clean it.

How to make a fish pond heater?

Fish pond heaters are quite expensive, especially the ones with a high wattage. If you think you can’t afford its price, you can make a homemade or DIY pond heater. But the question is, how? The first thing you must do is to prepare the materials.

If you already have the materials that you need, it’s time to assemble them. You can also watch some videos on YouTube about how to make a fish pond heater. After assembling the heater, you can now place it in the bottom of the pond. Make sure you don’t plug the power cable when you place the heater. You can only plug it when you get out of the pond.

How many watts heater for 7000-gallon pond?

Fish ponds with more than 5000 gallons of water are quite large. If you want to keep the water pond warm, then you need to choose the right pond heater. Among the three types of pond heater, which one is fit for your large pond? If your purpose is to heat the entire pond, your best option would be the In-line Electric Water Heater.

If you want to know how many watt heaters are for 7000 gallons, you must check the ambient temperature of the water. A minimum of 1 kW (1000 watts) is for every 1000 gallons. And if you want to maintain a higher temperature for your 7000-gallon pond, you can look for a heater with an electrical power usage of 7 kW (7000 watts).

Where to buy pond heater?

With all the information provided to help you decide which pond heater is fit for your pond, that’s your choice. Now, you are probably asking yourself where you can buy a reliable pond heater. As you have read the pond heaters buying guide, one of your best options would be Amazon. It is a well-known affordable supplier, and you can trust the quality of its products.


The winter season could bring damage to your pond, and you might even lose your fish. And right now, you are probably confused, trying to find out for possible solutions and effective devices. What matters the most is you can’t lose your fish in winter. And that’s the topmost reason you should consider having the best pond heaters that could keep your pond free from ice. Having a fish pond in a region that experiences the cold winter can be challenging. But the use of pond heaters makes it easier for you and your fish. Whether it is a floating or submersible pond heater that you prefer, it is easy to use and maintain.

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