A thermostatically controlled 1500-watt de-icer keeps roughly a 30-inch circle of open water in a stock tank down to sub-zero air temperatures, which is enough to stop a cold plunge from freezing solid overnight. Wattage and tank material are the two variables that actually matter — 1000W to 1500W units cover most residential setups, split between models rated for metal tanks and models safe for plastic or Rubbermaid tanks.
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Top Pick
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Versatile
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Budget
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Best Value
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Best for Reliability
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| Product | Farm Innovators H-419 Ice Chaser Submergible Tank De-Icer, 1500W | Farm Innovators H-418C Convert-Able Floating/Submergible De-Icer, 1250W | Farm Innovators DPH-15 Drain Plug Tank De-Icer for Rubbermaid Tanks, 1500W | Farm Innovators H-439 Submergible Tank De-Icer, 1000W | Farm Innovators H4815 Floating Stock Tank De-Icer, 1500W |
| Wattage | 1500W | 1250W | 1500W | 1000W | 1500W |
| Mechanism | Submersible | Floating or submersible (convertible) | Submersible (drain-plug mount) | Submersible (protective cage) | Floating |
| Tank material | Plastic & metal | Plastic & metal | Plastic (Rubbermaid-compatible) | Plastic & metal | Metal tanks only |
| Cord protection | Anti-chew cord protector | Chew-proof cord | Standard cord | Standard cord | Standard 10 ft cord |
| Buy Now | Check Price → | Check Price → | Check Price → | Check Price → | Check Price → |
Quick Tips
Match wattage to climate severity — 1000W handles mild freezes, 1500W is needed for sustained sub-zero nights.
Check tank material before buying: some de-icers are rated for metal tanks only, others are safe in plastic or Rubbermaid tanks.
Choose submersible over floating if animals or debris could dislodge a floating unit, since submersible models sit fixed at the bottom.
Always plug de-icers into a GFCI outlet, since these units run submerged or floating in water outdoors.
Farm Innovators H-419 Ice Chaser Submergible Tank De-Icer, 1500W
Best for year-round cold plunge use
Farm Innovators H-419 Ice Chaser Submergible Tank De-Icer, 1500W
Best for year-round cold plunge use
What we like
- Rated as the most powerful submersible de-icer in the Farm Innovators lineup at 1500W.
- Safe for use in both plastic and metal stock tanks, unlike single-material competitors.
- Anti-chew cord protector adds durability for tanks near livestock or pets.
- Thermostatically controlled, so it only draws power when water nears freezing.
What we don't
- 1500W draws more power than lower-wattage models, raising winter electricity cost.
- Submersible design sits at the tank bottom, making it harder to inspect than a floating unit.
- Cast aluminum construction adds weight versus lighter plastic-bodied de-icers.
You get the highest wattage in this lineup here, which matters if your stock tank sees consistent sub-zero nights rather than occasional light frost. It's rated safe for both plastic and metal tanks, so material compatibility isn't a decision you have to make separately.
This is the pick for anyone running a stock tank cold plunge through a full winter season rather than storing it once temperatures drop. If your tank only needs occasional freeze protection, a lower-wattage model saves on power draw without leaving you under-protected.
Farm Innovators H-418C Convert-Able Floating/Submergible De-Icer, 1250W
Best for flexible tank setups
Farm Innovators H-418C Convert-Able Floating/Submergible De-Icer, 1250W
Best for flexible tank setups
What we like
- Converts between floating and submersible modes by removing the float attachment.
- Cast aluminum construction with a self-regulating thermostat.
- Chew-proof cord adds protection outdoors.
- 1250W sits between the budget and high-power tiers, covering most moderate winters.
What we don't
- Not rated as the most powerful option for extreme sub-zero climates.
- Convertible design has more moving parts than a fixed floating or submersible unit.
- No stated ice-free diameter figure in the listing, unlike some competitors.
You get one de-icer that adapts to how you actually use your stock tank, since removing the float switches it from a surface unit to a submersible one. That flexibility matters if you move the tank between locations or change setup seasonally.
This is the pick if you're not sure yet whether floating or submersible suits your setup better. If you already know you want maximum wattage for a harsh climate, the 1500W submersible option is the more direct choice.
Farm Innovators DPH-15 Drain Plug Tank De-Icer for Rubbermaid Tanks, 1500W
Best for Rubbermaid and plastic stock tanks
Farm Innovators DPH-15 Drain Plug Tank De-Icer for Rubbermaid Tanks, 1500W
Best for Rubbermaid and plastic stock tanks
What we like
- Designed specifically to install through the drain plug opening on Rubbermaid-style tanks.
- 1500W output matches the top-tier metal-tank options despite being built for plastic.
- Hidden-cord design keeps the cord out of reach in active tanks.
- Thermostatically controlled to limit power draw to freezing conditions.
What we don't
- Only fits tanks with a compatible drain plug opening, not all stock tank designs.
- Not sold as a floating unit, so it lacks that installation option.
- Listing doesn't specify an ice-free diameter figure.
You install this one through the drain plug rather than dropping it in loose, which matters if your stock tank is a Rubbermaid-style poly tank without a metal-safe rating. It still delivers 1500W, so plastic tank owners aren't stuck with a lower-power option.
This is the pick specifically for Rubbermaid or similar poly stock tanks. If you're using a galvanized metal tank instead, a de-icer built for metal is the more straightforward match.
Farm Innovators H-439 Submergible Tank De-Icer, 1000W
Best value for moderate winters
Farm Innovators H-439 Submergible Tank De-Icer, 1000W
Best value for moderate winters
What we like
- Lower 1000W draw costs less to run through the season than 1500W units.
- Protective cage design keeps the heating element away from direct contact.
- Rated safe for both plastic and metal tanks.
- Thermostatically controlled to activate only near freezing.
What we don't
- 1000W may not be enough for consistently sub-zero climates.
- No convertible or floating option — submersible only.
- Doesn't include the anti-chew cord protector found on higher-tier models.
You get freeze protection at the lowest wattage in this lineup, which keeps running cost down if your winters bring occasional hard frost rather than sustained sub-zero stretches. The protective cage design also shields the heating element from a submerged tank floor.
This is the pick for milder climates or as a budget-conscious first de-icer. If you're in a region with regular sub-zero nights, the 1500W options provide more margin.
Farm Innovators H4815 Floating Stock Tank De-Icer, 1500W
Best for open metal stock tanks
Farm Innovators H4815 Floating Stock Tank De-Icer, 1500W
Best for open metal stock tanks
What we like
- Keeps roughly a 30-inch diameter ice-free area even in sub-zero temperatures, per the listing.
- Floating design makes it easy to check and remove without draining the tank.
- Heavy-duty float resists rust and corrosion.
- 10-foot cord gives more placement flexibility around the tank.
What we don't
- Rated for metal tanks only, so it's not an option for plastic or Rubbermaid tanks.
- Floating units sit exposed on the surface, unlike submersible designs.
- No convertible submersible mode if your setup changes later.
You get a straightforward floating de-icer built specifically for galvanized or metal stock tanks, with a stated ice-free clearance of about 30 inches even in sub-zero air. That's a concrete number to check against your tank's size before buying.
This is the pick if you have a metal stock tank and want a simple floating setup. If your tank is plastic or Rubbermaid, this isn't rated for that material and you'll need a plastic-safe option instead.
What to Look For
Wattage determines how much ice-free water you keep in freezing conditions. Most residential stock tanks need 1000W to 1500W, not the 250W units made for small buckets.
Tank material changes which de-icer is safe to use. Metal tanks tolerate more heater designs, while plastic or Rubbermaid tanks require units specifically rated for poly surfaces.
Mounting style is a tradeoff between speed and stability. Floating de-icers clear ice fastest, while submersible units stay put and resist being knocked loose.
Who Should Skip This
If you live somewhere winters rarely dip below freezing, a de-icer is unnecessary spend — a simple insulated cover keeps your stock tank workable through cold snaps. If you're running a heated or actively chilled cold plunge system already, a de-icer is redundant since your chiller maintains temperature control on its own.
For anyone still deciding whether a stock tank makes sense as a cold plunge at all, a smaller inflatable tub is a lower-commitment way to start.
Quick Picks — In Case You've Already Decided
Farm Innovators H-419 Ice Chaser Submergible Tank De-Icer, 1500W
Check Price on AmazonFarm Innovators H-418C Convert-Able Floating/Submergible De-Icer, 1250W
Check Price on AmazonFarm Innovators DPH-15 Drain Plug Tank De-Icer for Rubbermaid Tanks, 1500W
Check Price on AmazonFrequently Asked Questions
How many watts do I need to de-ice a stock tank cold plunge?
Most 100-300 gallon stock tanks need 1000W to 1500W to stay ice-free through sub-zero nights. Smaller tanks or milder climates can use lower-wattage units.
Will a stock tank de-icer overheat my cold plunge water?
No — thermostatically controlled de-icers only activate near freezing and shut off once ice risk passes. They're built to prevent freezing, not to warm water for use.
Can I use a metal-tank de-icer in a plastic or Rubbermaid tank?
Not safely — de-icers rated for metal tanks can overheat and damage plastic or poly surfaces. Check the listing for plastic or Rubbermaid compatibility before buying.
Floating or submersible de-icer for a cold plunge?
Floating units clear ice fastest in open water, while submersible units resist being knocked loose and sit fixed at the tank floor. Submersible is usually the safer choice for an actively used cold plunge.
Do I still need a de-icer if I have a cold plunge chiller?
If your chiller runs year-round and maintains a set temperature above freezing, a separate de-icer is usually unnecessary. De-icers are for unpowered or seasonally idle stock tanks that would otherwise freeze solid.
Buying Guide
You don't need a full chiller to winterize a stock tank cold plunge — you need a de-icer matched to your tank's material and wattage. Floating units work fastest in open tanks, submersible units resist tipping, and 1000W to 1500W covers most sub-zero nights.
See our [chiller-sizing guide](/chiller-sizing-calculator) for year-round control.