Laguna PowerHeat 315-Watt Heated Pond De-Icer

Last updated date: November 9, 2020

DWYM Score

8.3

Laguna PowerHeat 315-Watt Heated Pond De-Icer

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We looked at the top Pond Heaters and dug through the reviews from some of the most popular review sites. Through this analysis, we've determined the best Pond Heater you should buy.

Editor's Note November 27, 2020:
Checkout The Best Pond Heater for a detailed review of all the top pond heaters.

Overall Take


In our analysis of 27 expert reviews, the Laguna Laguna PowerHeat 315-Watt Heated Pond De-Icer placed 4th when we looked at the top 5 products in the category. For the full ranking, see below.

From The Manufacturer

De-Icer for ponds whose temperatures are down to 20 degrees Fahrenheit. Highly-visible LED pilot light that indicates when unit is on. Integrated thermostat shuts off the De-Icer when it overheats, protecting internal components from damage. 315 watts. 7 meter (22 feet) electrical cord with grounded plug. Aids in gas exchange by keeping ice from forming around heater.

Expert Reviews

Expert Summarized Score

8.2
6 expert reviews

User Summarized Score

8.4
311 user reviews

What experts liked

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).
- BestReviews
Comes from a trusted brand Integrated automatic thermostat for easy functionality Simple to install. Works flawlessly to provide gas exchange in and out of the water. Long power cord.
- BackyardStyle
Long Power Cord. LED on/off Light. Automatic Shut Off. Works in low temperatures. Creates a hole 20-25 inches.
- Fish Keeping Forever
Has a LED power indicator. Includes a special element to melt snow. 22-foot electrical cord. Can be anchored if necessary.
- Fish Tank Advisor
Great for Koi ponds. Good heat spread. Top heater prevents snow buildup. Overheating protection.
- Pond Informer
Easy to use. Long power cord. Built in thermostat. Can handle very low temperatures. Overheat protection. Safe for fish and plastic ponds. LED indicator.
- Aquascape Addiction

What experts didn't like

Some buyers report durability issues with this option (dies within a few months).
- BestReviews
Quite a high price. Short warranty.
- BackyardStyle
Cost to run. Expensive.
- Fish Keeping Forever
Short warranty period.
- Pond Informer
LED Indicator is pretty faint. Motor and heating element are not the most durable.
- Aquascape Addiction

An Overview On Pond Heaters

A pond can enhance your outdoor spaces, creating a peaceful retreat in your own back yard. 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.

The Pond Heater Buying Guide

  • 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.