Chicken Water De-Icers: Submersible Heaters for Buckets and Open Tubs
A chicken water de-icer is a submersible heater that lies in an open bucket or tub and keeps the water from freezing over. It suits open water for ducks and mixed flocks, not a closed fount. For a 5-gallon bucket, 250 watts are enough according to one manufacturer's sizing chart. Our pick is the 250-watt Farm Innovators C-250, which its manufacturer documents as thermostatically controlled and safe in plastic. The two marketplace listings on this page have seller-only data and are not picks.
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The short version
Use a de-icer only in an open container that never runs dry. Farm Innovators' sizing chart gives 250 watts for 5 gallons down to −10 °F and for 25 gallons down to 10 °F. Check that the model is approved for plastic if your bucket is plastic: the same manufacturer says some de-icers are safe in plastic and others are not. Plug it into a fixed GFCI outlet. For a closed fount or a nipple bucket, a heated base or a belt is the better tool.
A de-icer is a heating element in a sealed housing with a thermostat and a cord. It goes into the water. Some float; the kind sold for chicken water sinks and lies on the bottom, which is why it is also called a submersible chicken water heater.
It comes from the stock tank, not from the poultry yard. That explains its two characteristics: it needs open water around it, and it has far more power than a poultry drinker. Among the chicken water heaters it is the one for open containers.
On this site a pick is a product whose data we could read in the manufacturer's own documents. Three de-icers meet that bar, all from Farm Innovators.
Pick for open buckets and tubsAd
Farm Innovators
Farm Innovators C-250 de-icer, 250 W
A 250-watt cast-aluminum de-icer that the manufacturer describes as thermostatically controlled and safe in plastic.
Why here: The 250-watt class that the manufacturer's chart gives for 5 gallons down to −10 °F, with a thermostat, “safe in plastic” and a one-year guarantee stated on the manufacturer's page, and an instruction sheet we could read.
Best for: Keepers who water from an open bucket or small tub and want a de-icer with a manufacturer's page and instruction sheet.
What speaks for it
Thermostatically controlled to operate only when necessary (manufacturer)
“Safe in plastic” (manufacturer); the instruction sheet lists it for plastic, structural foam and metal
Constructed of cast aluminum (manufacturer)
Guaranteed for one year (manufacturer)
What to know first
250 W is several times the draw of a heated base or heated drinker
Made for open water: must stay submerged, so the container may never run dry (instruction sheet)
The manufacturer's product page names no listing mark for this model
The instruction sheet says “Do not use extension cords”
Type
Submersible de-icer, cast aluminum
Power
250 W
Capacity
containers up to 25 gal (manufacturer)
Thermostat
built in (manufacturer)
Use
In an open bucket or tub; safe in plastic (manufacturer)
This selection covers only products sold on Amazon. It is not a market overview. Products are compared by manufacturer and listing data, not by hands-on testing. How we evaluate
Farm Innovators C-250 and C-500: cast-aluminum utility de-icers
The two share one product page. According to the manufacturer they draw 250 and 500 watts, are constructed of cast aluminum, are thermostatically controlled to operate only when necessary, are labeled “safe in plastic”, are good for use in containers up to 25 gallons and are guaranteed for one year. The page gives the container size and the guarantee once, for both models. It names no listing mark and no cord length.
The C-250*(paid link) is the size for a bucket or a small tub. The C-500*(paid link) draws four to eight times what a heated base or a heated drinker uses and is oversized for a 3-gallon bucket; it has its place in a large open tub in a cold region, for example the duck tub described under heated duck waterers. One deviation to know: the Amazon listing of the C-500 names containers up to 50 gallons, according to the seller, while the manufacturer's product page says up to 25 gallons. We follow the manufacturer's page.
Farm Innovators C-50P: for nipple buckets
The C-50P*(paid link) draws 150 watts and is designed for use with nipple-drinker chicken water buckets, according to the manufacturer, which also describes it as thermostatically controlled, Teflon coated and safe in plastic. Its product page names no bucket size, no listing mark and no warranty period. How it compares with a belt around the bucket is covered under heated chicken water buckets.
Two marketplace listings, seller data only
A 250 W marketplace de-icer*(paid link) with thermostatic control and a 500 W marketplace de-icer*(paid link) with a cast-aluminum body are sold in the low price class. All of that is according to the sellers, and we could read no manual for either. Not confirmed: whether they may be used in plastic, and whether they carry a listing mark. They are alternatives for readers who accept those gaps, not picks.
How many watts for how much water?
No extension service sizes a de-icer. One manufacturer does. The instruction sheet that Farm Innovators supplies with its de-icers contains a chart of wattage by tank size and outdoor temperature. The part that matters for poultry:
Lowest outdoor temperature
5 gallons
25 gallons
50 gallons
30 °F to 10 °F
250 W
250 W
500 W
0 °F and −10 °F
250 W
500 W
1,000 W
−20 °F
not listed
1,000 W
1,500 W
Two readings follow. For anything a backyard flock drinks from, 250 watts are the manufacturer's answer down to −10 °F. And at −20 °F the chart has no entry for 5 gallons at all, so a small open container is not what the manufacturer plans for in that cold.
The chart was written for Farm Innovators' own units. It does not certify a marketplace de-icer of the same wattage. It tells you which wattage class to look for.
Plastic or metal: check before you buy
This is the de-icer version of the compatibility trap that heated bases have. Farm Innovators puts it in one sentence on its product pages: some de-icers are safe in plastic and others are not. Its instruction sheet names two floating models that must not be used in plastic or structural foam tanks, and lists the cast-aluminum utility models C-250 and C-500 among those that are safe in plastic, structural foam and metal. According to the manufacturer's FAQ, “safe in plastic” means the unit was tested in plastic under UL specifications.
For a marketplace de-icer there is no such statement to read in advance. If your bucket is plastic or rubber, the approval for that material is the first thing to look for in the instructions.
The three documented models above all carry the “safe in plastic” label on the manufacturer's pages. The one-year guarantee is stated for the C-250 and the C-500; the C-50P page names no warranty period.
The rules that come with a de-icer
The Farm Innovators instruction sheet is the most detailed primary source on these devices. Its rules apply to its own products, and they are a sound checklist for any de-icer.
Fill first, then plug in
Do not plug the unit in until the container is filled and the unit is in place. Do not operate it out of water.
Use a GFCI outlet next to the container
The sheet asks for a ground-fault outlet, suitable for outdoor use and protected from rain and snow, installed by a qualified electrician right where the unit is used.
No extension cords
The sheet says so in capitals. The NFPA tip sheet for backyard coops says the same for the coop.
Protect the cord
Route it so that animals cannot damage or chew it, and inspect it before each season.
Remove lime deposits
Deposits on the element cause hot spots, which the manufacturer names as the primary reason for failure. Its FAQ suggests cleaning about every 30 days with vinegar and water.
Unplug before you reach in
Unplug the unit before removing it or servicing the container, and store it indoors after winter.
The University of Maryland Extension writes that ducks and geese seek water even in the coldest temperatures and need it deep enough to dunk and wash their heads. A nipple drinker cannot offer that. An open tub with a de-icer can.
For chickens, open water has two drawbacks. It gets dirty faster than a closed drinker. And the University of Minnesota Extension names moisture together with cold as the main cause of frostbite; a rooster that dips his wattles into an open tub carries water on them into the cold. The signs and the first steps are on the page about chicken frostbite. If you keep chickens only, a closed heated drinker is the cleaner solution. Those are compared under best heated chicken waterers.
Which heater for which container?
Which one for which coop?
If you water from an open bucket or a small tub → Farm Innovators C-250 de-icer, 250 W
Every product in that list has manufacturer documentation.
What a de-icer costs to run
A de-icer is the hungriest water heater in the yard. The nameplates say 250 and 500 watts, several times the 60 or 100 watts of a complete heated waterer. A thermostat keeps the element from running all day; by how much depends on the weather and on how exposed the tub is. The Farm Innovators sheet suggests shielding the container from wind and covering part of the surface to make the job easier.
Upper bound for a 250 W de-icer
Energy per day
6 kWh
per day
–
per 30 days
–
Formula: watts × hours ÷ 1,000 × your price per kilowatt-hour. This is an upper bound: it assumes the device draws full power for every hour entered. A device with a thermostat runs less. Enter the rate from your own electricity bill; there is no preset. For orientation only, a dated example: 18.31 cents per kWh was the U.S. average residential price for July 2026 (EIA, Electric Power Monthly, Table 5.6.A).
A de-icer with its own thermostat does not need a thermostat outlet in front of it. What such an outlet is for is explained on the Thermo Cube page.
Common mistakes
Putting a de-icer into a closed fount. It is built for open water around the element.
Letting the bucket run low. An element that surfaces is running in air.
Assuming plastic is fine. It depends on the model, and the manufacturer has to say so.
Buying by wattage alone. More watts do not make the water safer, only the meter faster. Match the class to the container.
Building one instead. Aquarium heaters and bulbs in tins are not de-icers. Why is explained under DIY heated chicken waterers.
Winter coop finder
Question 1 of 3
This selection covers only products sold on Amazon. It is not a market overview. Products are compared by manufacturer and listing data, not by hands-on testing. How we evaluate
What do you want to sort out first?
Liquid water is needed every day. Extra heat is optional for most adult flocks.
Bottom line
A de-icer is the right tool for open water and the wrong one for a closed drinker. For a bucket or a small tub, look in the 250-watt class and make sure the unit is approved for your container's material. The Farm Innovators C-250 is our pick for that class; the C-500 and the C-50P are the documented models for large tubs and nipple buckets, and the two marketplace de-icers remain alternatives with seller data only. If you are not tied to open water, the routine and the other options are in how to keep chicken water from freezing.
Questions keepers ask
Can you put a de-icer in a plastic chicken waterer or bucket?
Only if the de-icer is approved for plastic. Farm Innovators states in its instruction sheet that two of its floating models are not safe in plastic or structural foam tanks, while its cast-aluminum utility de-icers are. For the marketplace de-icers on this page the sellers' listings do not settle the question, so check the instructions in the box before the unit goes into a plastic bucket.
How many watts does a chicken water de-icer need?
For chicken-sized containers, 250 watts. The sizing chart in the Farm Innovators instruction sheet lists 250 watts for 5 gallons at every temperature it covers down to −10 °F, and for 25 gallons down to 10 °F. At 0 °F and below, 25 gallons call for 500 watts. The chart was written for that manufacturer's own de-icers, so treat it as orientation for other brands.
Does a de-icer heat the water?
It keeps the water from icing over and little more. Farm Innovators writes that its de-icers are designed to keep water de-iced only and switch on when the water temperature approaches freezing. In its FAQ the manufacturer gives about 42 to 47 °F as the water temperature its cast-aluminum units hold at −10 °F outside. That is liquid, not warm.
What happens if a de-icer runs dry?
It can overheat. The Farm Innovators instruction sheet says not to operate a de-icer out of water and not to plug it in before the container is filled. According to the manufacturer's FAQ, no de-icer on the market has a moisture sensor; its cast-aluminum units shut off by thermostat after two to three minutes in air. For a marketplace unit no such data exists, so keep the container topped up.
Is a submersible chicken water heater better than a heated base?
They serve different containers. A submersible heater needs an open bucket or tub that it can lie in under water. A heated base stands under a gravity-fed fount and never touches the water. For chickens alone, a closed drinker on a base or a complete heated waterer keeps the water cleaner. For ducks, which need open water to dunk their heads, a de-icer in a tub is the fitting tool.
Coop heat, winter water and the sources behind both
We are the editorial team at chickencoopheater.com. We read what university extension services, the NFPA and manufacturers publish about heating a coop and keeping water liquid, and turn it into plain-English buying advice with the sources on every page.