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The Best Pond Heater - 2021

Last updated on December 3, 2020

We looked at the top 5 Pond Heaters and dug through the reviews from 27 of the most popular review sites including and more. The result is a ranking of the best Pond Heaters.

Best Pond Heater

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Our Picks For The Top Pond Heaters

Show Contents
Our Take
Experts Included
Pros
Cons
  Great for Larger Ponds

K&H Pet Products Thermo 3.0 Pond Heater, 100-Watt

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K&H Pet Products

Thermo 3.0 Pond Heater, 100-Watt

Overall Take

Big CapacityThis de-icer can work on ponds of up to 1,000 gallons of water while using only 100 watts of power.

Experts Included
DWYM Outdoor and Garden Experts plus BackyardStyle, Modest Fish, Fish Tank Advisor. Along with user reviews from Amazon, Walmart and Home Depot.
Pros
" Works in huge ponds of up to 1,000 gallons. Very energy-efficient, only uses 100 watts of power. Compact and super lightweight. Long lasting design with protected heating element."
Cons
"Cord could be longer. Internal thermostat only keeps unit from overheating, doesn’t switch on/off otherwise."
  Most Natural

TetraPond Thermostatically Controlled Fish Pond Heater & De-Icer

TetraPond

Fish Pond Heater & De-Icer

Overall Take

Stone FinishThis pond de-icer is made to look like a stone for a natural solution to your pond icing over.

Experts Included
DWYM Outdoor and Garden Experts plus BestReviews, Chicago Tribune, Paint A Fish, Fish Keeping Forever, BackYard Alpha, Fish Tank Advisor. Along with user reviews from Amazon and Walmart.
Pros
" Natural stone finish that blends in well. 300 watts. Works to -20F. Comes with an energy-efficient thermostat and a 15-foot cord. Affordable."
Cons
"May only last one or two seasons."
  Best for Small Ponds

Farm Innovators P-418 1,250-Watt Cast Aluminum Floating Pond Heater & De-Icer

Farm Innovators

1,250-Watt Pond Heater & De-Icer

Overall Take

Effective and HandyAlthough this de-icer has a capacity of up to 600 gallons, it works best on ponds of between 50 and 300 gallons.

Experts Included
DWYM Outdoor and Garden Experts plus BestReviews, Chicago Tribune, BackyardStyle, Paint A Fish, BackYard Alpha, Modest Fish and 1 more. Along with user reviews from Amazon and Walmart.
Pros
" Sturdy and economical to run, this is a versatile option that can be used for both tanks and small ponds."
Cons
"Some reports of units failing after only a few months' use."

Laguna PowerHeat 315-Watt Heated Pond De-Icer

Laguna

PowerHeat 315-Watt Heated Pond De-Icer

Overall Take

Experts Included
DWYM Outdoor and Garden Experts plus BestReviews, BackyardStyle, Fish Keeping Forever, Fish Tank Advisor, Pond Informer, Aquascape Addiction. Along with user reviews from Amazon.
Pros
" Works well down to 20F. 22-foot cord. Thermostat keeps de-icer from overheating. LED light (so you will know when it's on) and a top-mounted heating element (to keep snow from building up)."
Cons
"Quite a high price. Short warranty."
Don't just take for granted what one reviewer says. Along with our own experts, DWYM analyzes the top expert reviews of the leading products and generates a score you can actually trust.
12

Products Considered

We identified the majority of the pond heaters available to purchase.
5

Products Analyzed

We then selected the leading and most popular products for our team to review.

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27

Expert Reviews Included

In addition to our expert reviews, we also incorporate feedback and analysis of some of the most respected sources including: BackyardStyle, Modest Fish, Fish Tank Advisor, BestReviews, Chicago Tribune.

10,640

User Opinions Analyzed

We also incorporate user reviews from the leading retailers including

Our experts reviewed the top 5 Pond Heaters and also dug through the reviews from 27 of the most popular review sites including and more. The result is a ranking of the best of the best Pond Heaters.

DWYM is your trusted roduct review source. Our team reviews thousands of product reviews from the trusted top experts and combines them into one easy-to-understand score. Learn more.

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Look for the DWYM seal for products that are the best in their category.

The Best Overall

K&H Pet Products Thermo 3.0 Pond Heater, 100-Watt


Our Expert Score

9.8
3 expert reviews

User Summarized Score

8.2
915 user reviews

Our Take

Able to de-ice 1,000 gallons of water, this pond heater uses only 100 watts of power, keeping your utility bills low. The small, lightweight build creates a small hole in your outdoor pond, maintaining it day after day. It has a built-in thermostat that keeps it from overheating.

What other experts liked

Works in huge ponds of up to 1,000 gallons. Very energy-efficient, only uses 100 watts of power. Compact and super lightweight. Long lasting design with protected heating element.
- BackyardStyle
Thermostat prevents overheating. Perfect for smaller ponds.
- Modest Fish
Small size is lightweight and easy to put in and take out of the pond. Uses only 100 watts. Won't burn the pond liner. 12-foot power cord. Simple, rugged design. One-year warranty.
- Fish Tank Advisor

What other experts didn't like

Short power cord. Nor a very long warranty.
- BackyardStyle
Cord could be longer. Internal thermostat only keeps unit from overheating, doesn’t switch on/off otherwise.
- Modest Fish

Overall Product Rankings

Our Pond Heater Findings


K&H Pet Products Thermo 3.0 Pond Heater, 100-Watt

Great for Larger Ponds

What We Liked: Able to de-ice 1,000 gallons of water, this pond heater uses only 100 watts of power, keeping your utility bills low. The small, lightweight build creates a small hole in your outdoor pond, maintaining it day after day. It has a built-in thermostat that keeps it from overheating.


TetraPond Thermostatically Controlled Fish Pond Heater & De-Icer

What We Liked: With 300 watts of power, this de-icer can keep your pond heated up to outdoor temperatures of -20 degrees Fahrenheit. a 15-foot cord gives you plenty of reach, and the built-in thermostat ensures energy efficiency. It creates a hole in the ice that’s approximately 12 to 15 feet


Farm Innovators P-418 1,250-Watt Cast Aluminum Floating Pond Heater & De-Icer

What We Liked: This de-icer creates a hole in the ice that allows harmful gases to escape throughout the winter months. It’s made from patented cast aluminum to operate efficiently and safely while also enduring exposure to moisture. It creates about a 2-foot hole in the ice and is safe for both plant and fish life.

Our Pond Heater Buying Guide

A pond can enhance your outdoor spaces, creating a peaceful retreat in your own backyard. You can even add some small fish and plants to keep it healthy. But unless you live in an area where the temperature is warm year-round, chances are you’ll need to do a few things to protect your pond from cold temperatures.

You have two choices for winterizing your pond: shut it down for the winter or keep it running year-round. The latter requires routinely topping off your pond and monitoring ice buildup. The former means you’ll need to drain the water from the plumbing, remove the pump and oxygenating the water using a recirculating pump.

If you have fish and plant life, though, you’ll need to do what it takes to keep that life healthy even in the coldest temperatures. In colder weather, a sheet of ice will likely form on your pond. The problem with that is that it traps gases in the water, potentially harming the plant and fish life beneath that ice.

A pond heater is the easiest solution. Your pond heater will create a small hole in the ice that allows dangerous gases to escape. Pond heaters typically run on a small electrical current, so you won’t have to worry about excessive electricity usage, even with a larger pond.

DWYM Fun Fact

There are two types of natural ponds, one of which is permanent and the other temporary. Temporary ponds are also known as vernal ponds, and they dry up without regular rain, usually in the summer. A permanent pond will often include plant and fish life to help sustain it. The fish and plant thrive on the bacteria and algae that naturally form in a stagnant body of water over time. That’s why many manmade pond owners choose to stock their ponds with small fish and plants. Otherwise, they have to make an effort to regularly treat the water to avoid bacteria and algae from building up.

The Pond Heater Tips and Advice

  • Fish go into hibernation when the water temperature dips below 50 degrees, so make sure you stop feeding them at that point.
  • A de-icer will create a hole in a small section of the pond, which means it will have a maximum capacity. Make sure the pond de-icer you choose can handle your pond size. There’s also the option of using multiple de-icers, spacing them apart to cover the full length of your pond.
  • Since a de-icer floats on top of the water, it could disrupt your outdoor aesthetics. You can buy de-icers that are made to look like a stone, as well as others that have a low profile to keep things looking good.
  • If you have trees near your pond, the autumn months can be rough on it. A net can help keep leaves from getting in the pond, where they’ll fall to the bottom, decay and release gases. When combined with your de-icer, this can help keep your fish and plant life healthy.
  • Safety is important with any electrical appliance. Some de-icers have a built-in thermostat to keep them from overheating.
  • It can be tempting to set your de-icer up and forget about it until spring. But it’s important to check on it when temperatures drop and make sure it’s still doing its job.

About The Author

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Stephanie Faris 

Stephanie Faris is a novelist and professional writer. She lives in a beautiful one-acre home in the suburbs on the outskirts of Nashville. Her home and garden work has appeared on popular home sites. She's a true homebody and loves looking at new houses for sale for inspiration on her own home remodeling projects.