6 Best Water Tank Heaters For Livestock In Freezing Temps Old Farmers Trust
Prevent frozen troughs with these 6 farmer-trusted tank heaters. Our guide covers reliable submersible, floating, and drain-plug models for winter.
There’s nothing that says winter is here quite like the sound of an axe breaking ice on a stock tank at 6 a.m. It’s a chore nobody loves, and it’s a sign your animals aren’t getting the consistent water they need. A reliable de-icer isn’t a luxury; it’s a critical piece of equipment for keeping livestock healthy and hydrated when the temperature plummets.
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Choosing the Right De-Icer for Your Farm
The first thing to understand is that not all de-icers are created equal. The right one for your neighbor’s giant metal cattle tank might be total overkill—or even a hazard—in your smaller plastic goat trough. Your decision should hinge on three things: tank size, tank material, and the location of your power source.
There are three basic types to consider. Floating de-icers are simple to install but can be a toy for curious horses. Submersible or sinking heaters sit on the bottom, out of the way but harder to check on. Drain plug de-icers are the slickest setup, keeping the cord and unit entirely outside the tank, but they only work on specific metal tanks with a drain opening.
Wattage is the other big piece of the puzzle. A 250-watt unit might be fine for a 30-gallon tub in a mild winter, but it won’t stand a chance against a North Dakota cold snap in a 150-gallon tank. A 1500-watt beast will keep anything thawed, but it will also make its presence known on your electric bill. Match the power to the job.
K&H Ultimate Stock Tank Deicer: Top Performer
When you want a versatile, reliable workhorse, the K&H Ultimate is hard to beat. Its best feature is a very accurate internal thermostat. It only kicks on when the water nears freezing, which saves a surprising amount of electricity compared to simpler models that just run constantly.
This unit is designed to work as either a floater or a submersible, which gives you options. You can drop it in to float, or remove the flotation ring and let it sink to the bottom. The cord is heavily reinforced and chew-resistant, a feature you’ll appreciate if you have goats, pigs, or bored horses who see every cord as a challenge.
The K&H is an ideal all-around choice for tanks in the 50- to 100-gallon range. It’s safe for both plastic and metal tanks and gives you that "set it and forget it" peace of mind. It’s a smart investment for someone who just needs a de-icer to work without constant fiddling.
API 1500W Submersible Heater for Large Tanks
If you’re dealing with a large stock tank—100 gallons or more—and face truly bitter winters, you need to bring in the heavy artillery. The API 1500W submersible heater is exactly that. This isn’t for a small backyard setup; this is for ensuring a large herd has access to water in sub-zero conditions.
As a submersible unit, it sits on the bottom of the tank and heats the water from below, which is a very efficient method. It’s built with a sturdy protective cage to prevent the heating element from ever touching the sides of a plastic tank or coming into direct contact with an animal. It’s a simple, powerful, and robust design.
The trade-off for all that power is energy consumption. A 1500-watt heater will absolutely keep a large volume of water ice-free, but it draws significant power. This is the right tool when you have no other choice, but be prepared for the impact on your utility bill. It’s for serious cold and serious water volume.
Farm Innovators H-418 Floating Tank De-Icer
You’ll find Farm Innovators products in nearly every feed and farm supply store, and for good reason. Their floating de-icers are a common, straightforward solution that gets the job done. The H-418 is a classic example of this design: simple, powerful, and easy to deploy.
The biggest advantage of a floater is its simplicity. You just put it in the tank and plug it in. There’s no complex installation. The downside, however, is that it floats. Curious livestock, especially horses, may nudge, lift, or even pull it completely out of the tank, leaving you with a frozen trough and a useless heater sitting in the snow.
With 1000 to 1500 watts of power, these units have no problem handling standard-sized stock tanks. They are best used with less "mouthy" livestock like cattle or in a situation where you can secure the cord to prevent the unit from being easily removed. It’s a good, basic option for many common farm situations.
Behlen Country Drain Plug De-Icer Solution
For those with the right kind of tank, a drain plug de-icer is the cleanest and safest setup you can get. The unit replaces the tank’s existing drain plug, with the heating element inside the tank and the cord connection on the outside. This means there are no cords in the water for animals to chew or get tangled in.
The critical thing to know is that these are not universal. They are designed almost exclusively for metal stock tanks that have a standard 1.5-inch drain plug opening. You can’t use this on a plastic tank or a tank without a drain. Installation requires you to drain the tank, screw it in, and seal it properly.
Once installed, it’s a fantastic system. The heater sits at the lowest point, heating the water efficiently. The external cord is easy to manage and protect. If you are setting up a permanent winter watering station with a metal tank, this is the most professional and hassle-free long-term solution.
Farmight 1000W Sinking De-Icer for Safety
A sinking or submersible de-icer offers an excellent balance of safety and performance. By sitting on the bottom of the trough, it’s out of sight and out of mind for your livestock. The Farmight 1000W is a solid example of this type, offering enough power for most hobby farm tanks without the massive energy draw of a 1500W model.
These units are thermostatically controlled, so they only consume power when the temperature demands it. They are typically enclosed in a heavy-duty plastic or metal guard to keep the heating element off the tank floor, making them safe for all tank types, including plastic. The weight of the unit keeps it firmly on the bottom.
The biggest benefit here is peace of mind. You don’t have to worry about a horse tossing it out of the trough on the coldest night of the year. You just drop it in, secure the cord outside the pen, and trust that it’s doing its job unseen at the bottom of the tank.
Allied Precision 7521 Drain Plug Heater
Allied Precision is another trusted name for drain plug de-icers, offering a heavy-duty alternative to the Behlen. The model 7521 is a powerful 1500-watt unit designed for the toughest conditions. It’s built from cast aluminum, making it incredibly durable for a permanent installation.
Like all drain plug heaters, this is a specialized tool. It’s made for galvanized metal tanks with a drain hole. The installation is more involved than a drop-in heater, but the result is a seamless, safe, and highly efficient system. The power cord stays completely out of the animals’ reach.
This is a solution for a permanent, dedicated winter tank. If you have a metal tank that stays in one place all winter, a drain plug heater from a reputable brand like Allied Precision is one of the best investments you can make for a trouble-free watering system.
De-Icer Safety and Energy Use Considerations
No matter which de-icer you choose, safety has to be your top priority. Always plug your de-icer into a GFCI-protected outlet. This is non-negotiable. Regularly inspect the entire length of the cord for any signs of fraying, cracking, or chewing from rodents or livestock. A compromised cord in a water tank is an electrocution risk.
Think about your electric bill. A 1500-watt heater is essentially fifteen 100-watt light bulbs. If it runs 24/7, the cost adds up quickly. This is why a thermostatically controlled model is so important. It might cost a few dollars more upfront, but it will pay for itself in energy savings by only running when it’s actually needed to prevent ice from forming.
You can help your heater work more efficiently. Position your water tank where it gets the most winter sun and is sheltered from the wind. Building a simple plywood windbreak can make a huge difference. A partially covered tank also dramatically reduces heat loss. These small, practical steps reduce the heater’s workload, save you money, and extend the life of the unit.
Ultimately, the "best" water tank heater is the one that safely and efficiently fits your specific setup. Consider your tank, your climate, and your animals to make the right choice. A little planning now prevents a lot of frozen frustration later, ensuring your livestock have the fresh, unfrozen water they need to thrive all winter long.
