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K&H Thermo-Pond 3.0 Pond Deicer

Original price $89.99
Current price $59.98
  • World's most efficient patented and successful low-power pond de-icer
  • Low power consumption of 100 watts
  • Keeps a 12" hole in the ice of backyard ponds for only pennies per day
  • Floats on water surface; designed for use in ponds at least 18” deep
  • Never becomes hot thanks to its thermostatic control
  • Safely use with a plastic pond or a pond liner
  • Friendly to fish--prevents the buildup of toxic gases under the ice
  • Cold weather tested in sub-zero temperatures in northern Wisconsin
  • MET Safety Listed
  • Warranty: 1-year


The K&H Thermo-Pond 3.0 is a unique de-icer that maintains a hole in pond ice for just pennies a day. It's the worldʹs most successful energy efficient pond heater!

An open hole in pond ice allows proper gas exchange and helps fish survive the winter. The Thermo-Pond 3.0 facilitates this exchange by maintaining a 12-inch hole in pond ice, even in sub-zero weather. Add this K&H pond de-icer to create a healthier environment for your fish this winter.


While other high-wattage de-icers can drive electric bills through the roof, the K&H Thermo-Pond 3.0 is easy on your budget. It consumes a mere 100 watts of power and operates for just pennies a day. With the money you'll save compared to running a traditional pond de-icer, the Thermo-Pond 3.0 can pay for itself in a few months.

Internal thermostats automatically turn the floating Thermo-Pond 3.0 on and off as needed. Our specialized technology ensures that your pond de-icer will only run as often as needed to maintain a 12-inch hole in the ice. Unlike some other heaters, Thermo-Pond will never burn a pond liner or plastic pond.


The K&H Thermo-Pond 3.0 has been tested and certified by MET Labs to meet their high standards for electrical product safety. This deicer will not burn your pond or liner and will not harm your fish.

Finding the deicer that is right for me

K&H has solved the problem of having to use those high wattage deicers by creating a whole line of de‐icers along with a convenient zone chart for you to choose the correct de‐icer. (See the K&H Pond Chart below) Simply find your zone and use the chart to match up your pond size to find the deicer that is perfect for you.

**Warning: Deicer must be in water at all times. Do not operate when heating element is not fully submerged in water.

  K&H Perfect Climate Deluxe Pond Deicer - 250 Watt K&H Perfect Climate Deluxe Pond Deicer - 750 Watt K&H Perfect Climate Deluxe Pond Deicer - 1500 Watt K&H Thermo-Pond 3.0 - 100 Watt K&H Perfect Climate Submersible Pond Deicer- 300 Watt
Wattage 250 Watt 750 Watt 1500 Watt 100 Watt 300 Watt
Diameter 6" Round 6" Round 9" Round 12" Round 9" Round
Cord Length 12' cord 12' cord 12' Cord 12' cord 12' cord
Thermostat Type Internal - Preset Adjustable by user Internal - Preset Internal - Preset Internal - Preset
Floating or Submersible Floting & Submersible Floating & Submersible Floating & Submersible Floating Only Submersible Only
Safety Listing MET Listed MET Listed MET Listed MET Listed MET Listed
Warranty 2 Year Waranty 2 Year Warranty 2 Year Warranty 1 Year Warranty 2 Year Warranty
Recommended Pod Size Use Chart Below Use Chart Below Use Chart Below Up to 1,000 gallons per deicer Up to 300 gallons & 18" deep or less

K&H Pond De-icer Zone Chart

Care & Instructions

Minimum Depth Requirement

Please make sure your pond has a depth of at least 18 inches.

Already Frozen Ponds

  • If the ice on your pond is more than 2 inches thick, drill a hole with an ice auger and place the Thermo-Pond over the hole. Do not chop through the ice in smaller ponds as the shock waves can damage or kill your fish.
  • If the ice is only 1 or 2 inches thick, place the Thermo-Pond on the ice and it will melt its way through the ice.
  • Try to position your Thermo-Pond within arm’s reach of shore to avoid walking on thin ice.
  • Snow and ice should be removed from the top of your Thermo-Pond.
  • Always keep safety as your number one priority. Never walk on thin ice.
  • Please consult your pond professional on tips for overwintering fish.

Product Q&A

At what temperature should the de-icer turn on?

Our Thermo-Pond units are thermostatically controlled to keep the average water temperature just above freezing. They feature internal thermostats and will turn on and off as necessary to keep the pond from freezing over.

Is there a minimum required pond depth for the Thermo-Pond 3.0?

The pond needs to be at least 18” deep. The Thermo-Pond 3.0 is designed to keep a 12” hole in the ice directly around the Thermo-Pond only.

How can this use only 100 watts?

The Thermo-Pond 3.0 Floating Pond De-Icer is an energy efficient way to allow gas exchange for your fish while wintering. That is why it is designed to only keep a 12 inch hole in the ice. Essentially, it functions as a chimney for oxygen exchange in larger ponds.

Will my fish be safe with this deicer in the pond?

Your fish are quite safe, even when they do come in contact with the heating element of the deicer. The heating element will never get hot to the touch as long as it is submerged in water. You can actually reach down into the water and put your finger on the heating element and it will not burn you.

Please rest assured that your fish are quite safe when the Thermo-Pond Perfect Climate deicer is in the water. In the middle of winter when it gets really cold you’ll find your fish huddling around the deicer to keep warm, but the deicer will never harm them.

When my pond de-icer runs, foam forms on top of the water. Is this normal?

Yes, the foam buildup is harmless and completely normal for this product. The difference in temperature between the water inside the ring and the water outside the ring creates foam, which is why there is no foam buildup when the deicer is off.

How can I test my pond de-icer outside of a pond?

You can test the Thermo-Pond by placing it in the freezer for about an hour. Then remove the Thermo-Pond and plug it directly into an outlet. Hold onto the inside of the ring of the bottom half of the Thermo-Pond. It will begin to warm within about 5 minutes and will shut off automatically shortly after.

How long is the cord?

The cord is 12 feet long.

Can I use an extension cord with this product?

MET requires that all manufacturers put the extension cord statement “Do not use with extension cord” on every item that is MET listed by UL 499 standards. This is because they cannot test every extension cord on the market in conjunction with our products for safety. Also, MET suggests that an extension cord is not recommended as a permanent fixture and should only be a temporary solution when using any electrical product.

For more information on MET safety testing, please visit their website at

How long can a heated product be plugged in?

MET Safety Laboratories suggests unplugging the product if you leave your home on an extended vacation, as they do with any electrical appliance. Otherwise, it is designed for 24/7 operation and you can leave it plugged in all day. This item has been certified by MET labs to adhere to strict electrical safety standards. For more information, please visit

Is there an off/on switch?

There is not an off/on switch. It is always on when plugged in.