Best Stock Tank Heaters for Texas and Oklahoma Winters

The best stock tank heater for most Texas and Oklahoma ranches is a thermostatically controlled submersible or floating de-icer sized to your tank volume, usually 250 to 1,500 watts. Thermostatic models only run when water nears freezing, which keeps your electric bill sane during our short cold snaps. For a 100 gallon tank, plan on roughly 1,000 watts and a heater rated for the tank material you own.

Do I really need a tank heater in Texas or Oklahoma?

Our winters are mild most days and then turn mean for a week at a time. A hard freeze rolling down out of the Panhandle can lock a trough solid overnight, and livestock that cannot drink will not eat enough to hold condition. You may only run a heater a handful of nights each season, but on those nights it protects gains, milk, and pregnancies. That is cheap insurance compared to hauling hot water at daybreak or chipping ice with a post driver.

What wattage do I need for my tank size?

Wattage should match water volume and how exposed the tank sits. Use these rough starting points and size up if your tank sits in open wind.

• Up to 50 gallons: 250 to 500 watts
• 50 to 100 gallons: 500 to 1,000 watts
• 100 to 300 gallons: 1,000 to 1,500 watts
• Large open troughs: consider two heaters or a stock tank heater rated for big volume

A tank tucked against a barn wall or bedded in a windbreak holds heat far better than one standing alone in a north pasture, so placement matters as much as watts.

Which type of heater is safest for my trough?

There are three common styles, and the right one depends on your tank. Submersible heaters sink to the bottom and work well in poly and rubber tanks. Floating de-icers ride on the surface and suit most tanks but need a guard around livestock that like to play. Drain plug heaters thread into the tank fitting and stay out of the way of hooves entirely. For galvanized steel tanks, always confirm the heater is rated for metal, because some floating units are poly only. Whatever you pick, look for a thermostat, a guard, and a chew resistant cord.

How do I keep a tank heater from becoming a hazard?

Electricity and wet livestock demand respect. Run every heater on a circuit protected by a ground fault breaker, and inspect the cord for cracks before each season. Route the cord so horses and cattle cannot mouth it, using conduit or a cord guard where it leaves the tank. Never let a heating element rest against a poly tank wall, since a stuck thermostat can melt through. Check your tank daily anyway, because a tripped breaker or a critter chewed cord can freeze a trough while you assume all is well.

What else helps water stay open in a freeze?

A heater does more work when you help it. Bed the base of the tank in gravel or straw to slow heat loss into the ground. Cut a floating insulation collar or a foam board lid with a drinking hole to trap warmth. Keep tanks topped off, since a full tank holds temperature longer than a low one. Position tanks out of the prevailing north wind when you can. Good grooming and a warm coat help stock too, so a clean, dry animal in a quality blanket handles a cold night far better than a wet, matted one.

Frequently asked questions

How much does it cost to run a stock tank heater? A thermostatic 1,000 watt heater that cycles on only during freezing nights typically adds a few dollars per cold week, far less than a unit that runs constantly.

Can I use a stock tank heater in a rubber or poly tank? Yes, but confirm the heater is rated for that material and use a guard so the element never rests against the wall.

Will one heater keep a big trough open? In deep cold, a single small unit may lose the fight in a large open trough. Size up the wattage or run two heaters and insulate the tank.

Do I need a thermostat? Yes. A thermostatic heater only runs near freezing, which saves power and extends the life of the element.

How do I winterize the tank itself? Bed it in gravel, add a floating insulation collar, top it off daily, and keep it out of the wind.

Ranchline keeps the barn and horse side of your winter covered with quality blankets, sheets, grooming tools, and cold weather tack. Come browse Ranchline to get your string ready before the next freeze rolls in.