Kasco de-icers that keep water open around docks, boat lifts and shoreline structures through freeze-up. Half to one horsepower, three-year warranty, shipped across Canada.
Pond de-icers keep a hole open in the ice all winter — protecting docks, boats, fish and equipment from ice damage and winter fish kill. Shop Kasco Marine de-icers in 1/2 HP to 1 HP sizes for residential, commercial and harsh-winter conditions, plus the Aquascape 300-watt pond de-icer and cold-water pond care for smaller water gardens.
Free · No obligation
Sizing help
Order before freeze-up, not after
De-icers sell out in October and the ice does not wait. Tell us what you are protecting and the voltage available at the dock, and we will spec the unit and cord length while there is still time to install it properly.
1Tell us what you are protectingDock length, boat lift, shoreline structure or open water area
2We spec the de-icerHorsepower, voltage, cord length, mounting and thermostat control
3You get a written quoteDelivered before freeze-up, anywhere in Canada
A De-Icer Does Not Melt Ice. It Stops Ice Forming.
The unit hangs below the surface and drives a column of warmer water up from below. Water at depth sits a few degrees above freezing all winter, and moving it upward keeps a patch of surface from setting. Nothing is being heated - the de-icer is simply refusing to let that water sit still long enough to freeze.
That mechanism decides where you point it. Aimed at a dock crib or a boat lift, it protects the structure from ice pressure, which is what causes most winter damage on Ontario waterfronts. Aimed into open water on a pond, it holds a hole that lets trapped gases escape from under the ice sheet, which is what prevents winterkill in a stocked pond.
Two things get ordered wrong. The first is voltage: the H in 3400HD and 4400HD indicates a 240V supply, not a tougher unit, and the horsepower is identical to the 120V version. The second is cord length, measured to the actual outlet rather than to the shore. Send us the dock layout and the supply and we will get both right. Planning further ahead? Read when to install a pond de-icer in Ontario.
HD means 240V, not heavy dutyA 3400HD is the same 3/4 HP as a 3400D. The H is the supply voltage. Check the panel at your dock before ordering.
Three-year warranty across the rangeEvery Kasco de-icer carries three years - a year longer than the equivalent surface aerator.
They hang, they do not floatEach unit ships with 20 ft of suspension rope. Mounting angle and depth control the shape of the opening you get.
Cord length is specced to the dockKasco builds cords from 25 ft to 200 ft. Measure from the unit to the outlet, not to the shoreline.
A thermostat panel pays for itselfRunning only below a set water temperature cuts winter hydro considerably against running continuously.
Customer reviews
Fifty Years. Thousands of Ontario Ponds.
Join the property managers, marina operators and cottage owners who call us first.
★★★★★4.8 out of 5 based on Google reviews
★★★★★
Once again Ryan, Fountain Depot, has provided excellent service and maintenance on our 2 floating fountains. Fountain Depot resolves any issues quickly, effectively and professionally. Highly recommended!
Lee Cornish · Google review
★★★★★
If you have a pond, waterfall or fountain problem, I consider this THE place to go. I am a repeat customer over a decade, and highly recommend these folks. Ryan and his staff have made quick and creative-solution work of our pond and pump systems.
Mike Singleton · Google review
★★★★★
I have had the pleasure of working with Ryan from Fountain Depot for the past year +. He designed and rebuilt our fountain from the ground up. They are a very knowledgeable team of guys. Our condo community could not be happier with the job they did for us. Highly recommend them for all your fountain needs.
Matt J · Google review
★★★★★
Ryan and the Fountain Depot team are phenomenal! I highly recommend them for all of your fountain repair and maintenance needs. Our water feature looks better than ever. They walked us through the repair process, made some fantastic recommendations, and provided us with a schedule for recommended maintenance.
Kathryn Pettitt · Google review
★★★★★
I highly recommend the Fountain Depot. Ryan and his team are incredibly knowledgeable and timely. We sought a floating fountain and underwater lights for our client, and Ryan delivered precisely what our client was desiring. The Fountain Place continues to maintain the fountain, and we have had zero issues.
Brandon · Google review
Buying guide
Questions our techs answer every autumn
De-icers get ordered in a hurry once the forecast turns. Here is what to settle first.
What is the difference between a 3400D and a 3400HD?
Voltage, and nothing else. Both are 3/4 HP. The 3400D runs on 120V and the 3400HD runs on 240V. The same applies to the 4400D and 4400HD at 1 HP.
The H does not stand for heavy duty and the HD models are not built for harsher conditions. Check the supply at your dock or shoreline outlet before ordering - it is a different unit, not a different plug.
What size de-icer do I need?
It depends on how much open water you need to hold and how exposed the site is. The 1/2 HP 2400D suits a single dock, a boat lift or a small pond. The 3/4 HP units are the most common choice on Ontario waterfronts, and the 1 HP units cover marinas and multi-slip docks.
Current, wind exposure and depth all change the answer. Send us the dock layout and we will spec it.
How does a de-icer actually work?
It does not heat anything. The unit hangs below the surface and drives warmer water up from depth, where water sits a few degrees above freezing all winter. Keeping that water moving prevents the surface from setting.
Because it works by circulation rather than heat, the opening you get depends on mounting angle and depth as much as on horsepower.
Do I need a control panel with a de-icer?
Not to run one, but a thermostat panel is worth the money. It switches the unit on only below a set water temperature rather than running it continuously through the season, which makes a real difference to winter hydro.
See our Kasco control panels, or ask us which panel matches your horsepower and supply. Electrical work should be completed by a licensed electrician to local code.
Will a de-icer keep my fish alive over winter?
Indirectly, yes. Winterkill happens when a pond seals under ice and gases from decomposition build up with no way out. Holding an opening lets those gases escape.
On deeper ponds, diffused aeration run through winter does the same job while also circulating the whole column. Tell us the depth and we will advise which is the better fit.
What comes with the unit, and how long should the cord be?
Every Kasco de-icer ships with 20 ft of rope for suspension and carries a three-year warranty. Power cords are built from 25 ft up to 200 ft.
Measure from where the unit will hang to the actual outlet, not to the shoreline - the difference is where most people come up short. We can confirm the run before you order.
Free · No obligation
What Does It Cost to Run a Pond De-Icer All Winter in Canada?Real numbers from Kasco's published specs: $2–$3.50/day run continuously at typical Canadian hydro rates — and how a C-10 thermostat cuts that...Read the guide →
Do Fish Need a Hole in the Ice? Pond Winterkill ExplainedFish don't suffocate from lack of air — they die when sealed ice traps gases and stops oxygen production. Why a permanent...Read the guide →
What Size Kasco De-Icer Do You Need? Dock, Boat Lift & Pond Guide1/2, 3/4, or 1 HP? Kasco's official sizing chart translated for Canadian winters — open-water coverage by model, mounting angle, and region.Read the guide →
