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Your cart is empty.For 50 years, fishkeeping enthusiasts have looked to the Tetra name for products and solutions that add ease and beauty to their home. Whether you're an experienced hobbyist or just starting out, Tetra has everything you need–-from a large variety of quality fish food and innovative equipment to test kits and decor. In cold weather, toxic gases caused by decaying matter and fish waste can become trapped under the ice by releasing harmful pond gases. The TetraPond De-Icer helps release harmful pond gases by keeping an area of the pond ice-free. It features include a natural stone finish that blends in with your ponds surroundings. This product is 300 watts. Energy-efficient thermostat control shuts off power when not needed. UL listed. Effective to - 20°F (-28.8°C). 15 foot cord. The TetraPond De-Icer helps fish stay healthy all winter long making it your winter survival solution for fish!
cesar
Reviewed in the United States on March 7, 2025
So far working good
Shana
Reviewed in the United States on February 25, 2025
This little heater rock is a great value, doing its job in the harsh Minnesota winters without pulling large amounts of electricity. We use this rock heater to keep a hole open on our pond throughout the winter to release the gas that would be trapped by the ice. The rock works great keeping a small area open throughout the winter, when it gets really cold (negative temperatures) the heater can't keep up and will freeze into the ice but when it warms back up it breaks free again, because the top is not heated it will create a little crave for it's self in the snow, which works well. The plastic top isn't the best and we have gotten water in it before which affects the buoyance, which then we just replace the unit due to the low cost, which is why this heater gets a 4/5 stars. For the value of this rock heater you can't go wrong.
Dean Wertz
Reviewed in the United States on February 12, 2025
i purchased this heater 6 years ago. it's STILL GOING STRONG! i only put it in the pond when the water is going to freeze,so it doesn't stay in the water all winter. i'm very impressed with it in this Colorado mountain weather. i'll purchase another for sure when mine kicks the bucket.
Wendy
Reviewed in Canada on February 10, 2025
I've had this pond de-icer for only 2 months and it quit working and my pond has frozen all around it . NOT recommended! Amazon will not accept return!!! Only gave a star as it was required. 😠
Heather
Reviewed in the United States on January 8, 2025
Placed it in my 400 gallon koi pond to keep my fishes alive through the cold and snow. It seems to be working great because my pond hasn’t frozen and my fish are still alive.
Marie-Josée Bernier
Reviewed in Canada on January 29, 2025
Après 1 an et demi, la pierre ne chauffait plus et l'eau a pénétré à l'intérieur. Comme c'est garantie 3 ans, j'ai fait des démarches pour le service à la clientèle chez tetra (aquaticssupport) et leur ai exposé mon problème. Avec facture et photo du code gravé dans la pierre, la compagnie m'en a envoyé une nouvelle qui fonctionne très bien. Je suis donc bien satisfaite du service après vente. Merci.
Kathy G.
Reviewed in the United States on January 22, 2025
We bought this to ensure that there was an opening in the ice covering our water garden during a historic cold snap. It was easy to set up and works great, and hopefully will help our goldfish and hibernating frogs survive till spring.
Dixie
Reviewed in the United States on March 3, 2024
I ordered this the day before we were expecting a hard 3-day freeze. My 800-gallon above-ground fish pond ices over easily, so this was one of those last moment orders. It's not a water heater but it did keep the ice from forming around it and my teenage goldfish loved it! During the freeze they huddled up under it and would frequently swim about the pond in the very cold water. Usually they just paddle in place, not robustly swim about. So far as de-icing, it worked great. The surface of the pond has thin ice, but the area around the de-icer was ice free.This unit has a nice 15-ft electrical cord, but I used it with an outdoor heavy-duty extension cord and an outdoor waterproof extension protector that snaps tightly around the fittings. Works like a charm, and I don't have to worry about blowing rain or ice causing a shortI do not like the shape and it's light gray color. It floats on top of the water and looks like a ginormous gray tick. (I kid you not.) I have no other description for it except that if you squint your eyes, it might look like an ugly piece of floating gray plastic. But, hey, it works, so no point taken off.I gave 5 stars for overall, easy to use, and easy to install, and 4 stars for value for the money. The latter is because it runs up the electric bill at 300 watts. That's a bit extra on the electric bill for 72 hours straight (or longer), but compared to other de-icers, this is considered low wattage.One side note: I didn't allow my unit to float about freely, which it will if not secured. I secured my de-icer between two rock outcroppings so it wouldn't float around. IDK if it's designed to be a "moving" de-icer, but i made it stationary so the goldfish could huddle beneath it. They seemed to like that.If you're looking for an affordable de-icer with reasonable wattage, I recommend this unit. Some people use a temperature sensing cube Thermacube, but I prefer to disconnect the power cord when not in use.
Shay
Reviewed in Canada on February 15, 2024
This is the second pond heater I have owned and it is the best one yet. It is all plastic with the cord straight out of the bottom, my old one had a metal bottom and plastic on top, i always worried the the cord would rest against the metal and melt causing a short. This de-icer has no metal edges and gives me piece of mind. It melts about a one foot circle around it which is perfect for my fish. Would definitely buy again.
Michael Coffin
Reviewed in the United States on December 29, 2024
It reached 2 degrees here in Upstate NY and my pond frozen over completely using this product. It is rated for below zero, even though it has the help of an aerator. Waste of money. I ordered it early so my return window is gone. I am glad my pond is 4 feet deep in some areas or my Koi and my gold fish would be toast. I had to melt a small ares with warm water for gas exchange a d order a product that works. Very dissatisfied Tetra.
peanuts
Reviewed in the United States on November 7, 2024
I have a small round pond, about 8' diameter and 2 feet deep. I also have a waterfall to keep the water moving. Our winter temperatures got below freezing several times last winter. Any time it was going to stay below freezing for more than a day I put this on my pond. It worked great keeping a hole about 2' in diameter even when the temperature stayed below freezing for over a week and it snowed a few inches. The portion of the pond surface that did freeze did not have thick ice. The fish and resident frog as well as my plants survived the cold and I will be using it again this winter! This does not keep the water warm, it just keeps a hole in the ice for air circulation.
Kindle Customer
Reviewed in Canada on April 11, 2022
This product worked fantastic live in Ontario so very cold winters and it kept the pond open we just have a very small pond and it worked great had a nice long cord that was nice....sort of looks like a rock lol but I don't care about the appearances I just needed it to keep my fish alive over winter and that it did!! Highly recommend!
Customer
Reviewed in Canada on September 4, 2020
This system does keep my pond free of ice (small area of 3 feet square) during the Canadian winter of the Atlantic Province (encounter - 20 Celsius in January and February). This allow the gas build up to escape. I have not lost any Koi fishes for the past two winter. It works well and I am very satisfy. As for power bill, well it did not increase much, $10.00 CAN for two months payment for continuous operation days and nights as the temperature drop below -5 Celsius. Above it, the ground temperature keep the pond ice free therefore no need to have it turn on.
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