Posted by Blue Thumb Water Feature Team on Sep 24th 2026
How to Winterize a Pond, Fountain, or Water Feature for Fall & Winter
Last updated: September 2026
How you winterize a water feature depends on what you own. A fish pond needs different winter care than a ceramic vase fountain. A pondless waterfall can sometimes keep running through freezing weather, while water left inside a ceramic vase, brass bowl, or vulnerable plumbing can freeze, expand, and cause damage.
We work with ponds, fountains, waterfalls, pumps, and water-feature equipment every day, so we've put our fall and winter recommendations in one place.
Before prolonged freezing weather arrives: remove leaves and excess debris, clean accessible pumps and filters, protect equipment that can hold freezing water, and follow the winterization procedure for your specific water feature. If you have fish, use the water temperature—not simply the calendar—to guide feeding and seasonal care.
One important warning: don't automatically drain every underground basin or reservoir. Several of our buried fountain and pondless systems should remain partially or fully filled through winter to help protect against ground movement caused by freezing and thawing.
Jump to Your Water Feature
- Fish Pond or Water Garden
- Ceramic Vase Fountain
- GFRC Fountain
- Real Stone or Basalt Fountain
- Acrylic Fountain
- Brass or Copper Fountain
- Sugar Kettle Fountain
- Tiered Cast-Stone Fountain
- Pondless Waterfall
- Formal Falls®
- Large Pond, Lake Fountain, or Aeration System
- Winterization FAQ
Water Feature Winterization: Quick Guide
| Water Feature | Main Winter Priority |
|---|---|
| Fish pond | Control leaves, adjust fish feeding, maintain gas exchange, and protect equipment. |
| Ceramic vase fountain | Remove the pump and never allow water to freeze inside the vase. |
| GFRC fountain | Winterize the pump and basin correctly; follow the instructions for your specific kit. |
| Real stone fountain | Protect the pump, plumbing, and basin even if the stone remains outdoors. |
| Metal fountain | Drain vulnerable bowls, tubing, and supply lines so water cannot freeze inside. |
| Pondless waterfall | Monitor closely if running or properly remove and store the pump if shutting down. |
| Formal Falls® | Remove the pump, allow the plumbing to drain, and keep the buried basin approximately half full. |
How to Prepare a Fish Pond for Fall and Winter
Quick answer: Keep leaves and dying vegetation out of the pond, monitor the water temperature, change your fish-feeding routine as the water cools, protect seasonal equipment, and maintain winter gas exchange if fish will remain outdoors.
1. Install Pond Netting Before Heavy Leaf Drop
Don't wait until the pond is already full of leaves.
Leaves that sink eventually become organic debris on the bottom. Keeping them out now makes fall maintenance easier and reduces the amount of material decomposing through winter.
For heavier leaf drop, we recommend our Deluxe Pond Netting. Its 0.5-inch by 0.25-inch mesh catches smaller debris and is made for multiple seasons.
For a more economical seasonal option, use our Economy Pond Netting.
Tip: Support the net above the water whenever possible instead of allowing wet leaves to pull it down into the pond.
Shop Fall & Winter Pond Maintenance »
2. Remove Existing Leaves and Dying Plants
Scoop out loose leaves, sticks, string algae, and excessive organic debris before winter. Trim yellowing and dying aquatic plants before they collapse into the pond.
You do not automatically need to completely drain and pressure-clean an established pond every fall. Clean what needs to be cleaned without unnecessarily disrupting an otherwise healthy pond immediately before winter.
Hardy and tropical pond plants also have different winter requirements, so check the needs of the specific plants in your pond.
3. Use Water Temperature to Guide Fish Feeding
Don't decide when to stop feeding koi based only on the month. Check the water temperature.
Our Floating Pond Thermometer makes this easy.
| Water Temperature | What to Do |
|---|---|
| Above 65°F | Use an appropriate warm-season pond fish food. |
| 45°F–65°F | Feed Sakana Spring & Autumn Pellets. |
| Below 45°F | Stop feeding. |
This is why blanket advice like "stop feeding in October" isn't precise enough. October water temperatures in Michigan can be very different from October water temperatures farther south.
4. Switch to Cold-Water Pond Treatment
When pond water drops below 55°F, begin applying our Spring & Fall Clean Bacteria once per week according to the dosage directions.
It's formulated with cold-water bacteria that help break down leaves, twigs, muck, and sediment during cooler conditions.
Use it alongside good physical maintenance. If you can easily remove a pile of leaves, remove it rather than relying on bacteria to do all the work.
5. Clean Your Skimmer and Decide Whether the Waterfall Will Run
Check skimmer baskets frequently during heavy leaf drop and clean filtration components as needed.
If you're shutting the pond system down, protect pumps, filters, valves, and plumbing that could be damaged by trapped freezing water.
If you're keeping a waterfall running, watch it throughout the winter. Ice can redirect water outside the liner and lower the pond level surprisingly quickly.
6. Maintain Winter Gas Exchange
If fish are staying outside, they still need gas exchange through winter.
Aeration can help keep a small area open and reduce trapped gases. We carry options including our 2-Outlet Pond Aeration Kit and 4-Outlet Pond Aeration Kit, along with KoiAir and Sakana systems.
For winter use, avoid unnecessarily mixing the deepest water with the freezing surface. Depending on your pond, move the diffuser into a shallower area.
Do You Need a Pond De-Icer?
A de-icer isn't meant to heat the whole pond. Its job is to help maintain an opening in the ice for gas exchange.
Our seasonal pond products include the Thermo-Pond Floating De-Icer 3.0 100W and Perfect Climate de-icers in several wattages.
An aerator may keep an opening during milder weather, but severe cold can still freeze the surface. Check your pond during extreme weather rather than assuming everything is fine because the equipment is plugged in.
If the surface freezes over, don't repeatedly smash the ice with a hammer or other heavy object. It's much easier to have your aeration and de-icing plan in place before thick ice forms.
How to Winterize a Ceramic Vase Fountain
Quick answer: Remove and clean the pump, drain the ceramic vase, move the vase indoors if possible, and never allow water to freeze inside it. Leave the buried basin filled according to our vase-fountain instructions.
The most important rule is this: never let water freeze inside a ceramic vase. Freezing water expands and can crack the vessel.
- Turn off and unplug the fountain.
- Remove and clean the pump.
- Store the applicable pump submerged in water somewhere it cannot freeze.
- Remove water from the vase.
- Move the vase indoors whenever practical.
- If it must remain outside, cover it so rain, snow, and meltwater cannot collect inside.
We carry Fountain Covers for Vases and Urns in several sizes. For an open-top vase, place a sturdy board across the opening before installing the cover so the weight of rain or snow can't push the cover inside.
Should You Drain the Buried Vase Fountain Basin?
No. For our ceramic vase fountain systems, leave the buried basin filled through winter. The water helps counteract pressure from surrounding frozen soil and reduces the chance of the basin heaving upward.
Drain, clean, and refill the basin after everything thaws in spring.
Watch Us Winterize a Vase Fountain
If you'd rather see the process, watch our step-by-step vase fountain winterization video.
Watch our Vase Fountain Winterization video on YouTube »
How to Winterize a GFRC Fountain
Quick answer: Our handcrafted GFRC fountains can handle outdoor landscape conditions, but the pump and buried basin still need proper winter care.
We make our handcrafted GFRC fountains in Michigan using lightweight Glass Fiber Reinforced Concrete molded from natural stone formations.
For many of our GFRC fountain systems in prolonged freezing conditions:
- Remove and clean the pump.
- Store the pump according to its instructions somewhere it cannot freeze.
- Do not completely empty the buried basin.
- Keep the basin approximately 50% full where specified to help reduce freeze/thaw heaving.
Because we offer several GFRC configurations, always check the manual for your exact kit before winterizing it.
Shop Our Handcrafted GFRC Fountains »
Find Your GFRC Fountain Manual »
How to Winterize a Real Stone or Basalt Fountain
Quick answer: The stone itself may stay outdoors, but the pump, plumbing, fittings, lights, and buried reservoir still need the correct winter care.
Our Real Stone Fountains include granite, basalt, marble, onyx, limestone, and other natural stone designs.
Before prolonged freezing weather, remove and protect the pump where required, allow vulnerable plumbing to drain, and follow the basin instructions supplied with your specific fountain kit.
Don't assume that because natural stone can remain outdoors, every mechanical component should stay installed and full of water.
Find Your Real Stone Fountain Manual »
How to Winterize an Acrylic Fountain
Quick answer: Drain and protect the acrylic feature according to its specific design. Different acrylic fountains can require different disassembly steps.
Crystal Sphere Fountains
For our Crystal Sphere fountain systems:
- Unplug the fountain and let it drain.
- Lift the sphere and disconnect the hose.
- Tip the sphere to remove remaining water.
- Remove the lights and support components as instructed.
- Clean and store removable components.
- Protect the remaining connections through winter.
- Leave the buried basin in place with water rather than automatically draining it.
For our newer acrylic fountain designs, use the manual for your exact model instead of assuming the Crystal Sphere procedure applies to every acrylic fountain.
Find Your Acrylic Fountain Manual »
How to Winterize Brass and Copper Fountains
Quick answer: Don't leave water trapped in exposed bowls, supply lines, or small copper tubing where it can freeze and expand.
Brass Fountains and Wall Spouts
For brass wall spouts, shut down and remove the pump where required, completely drain the supply line, and protect the opening so water can't refill the plumbing.
Drain and protect brass bowls and other exposed vessels so rain, snow, or melting ice can't repeatedly fill and freeze inside them.
For applicable buried basin systems, follow the basin instructions rather than automatically emptying the reservoir.
Copper Tree and Flower Fountains
The small tubing used in our copper fountains is especially important. Do not allow water to freeze inside the copper tubes.
In areas with extended freezing temperatures, remove the fountain and pump according to the product instructions. Clean and store the pump somewhere it cannot freeze.
Find Your Metal Fountain Manual »
How to Prepare a Sugar Kettle Fountain for Winter
Quick answer: Protect the pump, plumbing, kettle connections, and automatic-fill components according to the exact Sugar Kettle kit you own.
Our Sugar Kettle fountains combine a cast-iron kettle with a pump, plumbing, and underground AquaBox® reservoir. Because the systems come in several sizes and equipment configurations, don't winterize one as though it were a ceramic vase or above-ground tiered fountain.
Before freezing weather, inspect the pump, plumbing, fittings, kettle, reservoir, and automatic-fill line for areas that could hold vulnerable water.
Find Your Sugar Kettle Manual »
How to Winterize a Tiered Cast-Stone Fountain
Quick answer: Drain the above-ground fountain, remove seasonal equipment, and keep rain, snow, and meltwater from accumulating in the bowls through freezing weather.
Our Tiered Fountains are above-ground cast-stone fountains, so they should not be treated like a buried AquaBox® fountain system.
- Drain standing water.
- Remove pumps, tubing, lights, stoppers, and other components as directed.
- Prevent water from collecting in the bowls.
- Move the fountain to a dry protected area when practical, or properly protect it outdoors.
The goal is to prevent water from becoming trapped inside the cast stone and going through repeated freeze/thaw cycles.
How to Winterize a Pondless Waterfall
Quick answer: You can either keep a pondless waterfall running and monitor it carefully, or shut it down, clean it, remove the pump, and leave the underground reservoir at least 50% full.
Shop Our Pondless Waterfalls »
Option 1: Keep It Running
Check the waterfall regularly for ice dams, redirected water, reduced flow, and falling reservoir levels.
Long, slow-moving streams are especially vulnerable to freezing. If ice redirects water outside the liner, your reservoir can lose water quickly and expose the pump.
Option 2: Shut It Down
- Clean leaves and debris from the spillway and stream.
- Unplug and remove the pump and check-valve assembly.
- Clean the pump.
- Store the applicable pump submerged in water somewhere it cannot freeze.
- Allow the hose and spillway to naturally drain back into the reservoir.
- Clean and store removable filter media.
- Leave the underground reservoir at least 50% full.
Don't completely drain the pondless basin. Keeping water in the buried reservoir helps counteract ground movement during freezing and thawing.
For more detail, read our Pondless Waterfall Maintenance and Winterization Guide.
How to Winterize Formal Falls®
Quick answer: The Formal Falls® weir can remain installed. Remove and store the pump, allow the plumbing to drain, and leave the buried basin approximately 50% full.
Our Formal Falls® weirs are designed to self-drain, which makes winter preparation simpler.
- Remove the pump.
- Disassemble and clean it.
- Store it according to its instructions somewhere it cannot freeze.
- Allow the plumbing to drain.
- Leave the buried basin approximately half full.
- Protect lighting controllers and remotes from snow and moisture.
The lights themselves can remain outside where specified.
What About Large Ponds, Lake Fountains, and Aeration?
Quick answer: Follow the winter procedure for the exact fountain or aeration equipment you own. Large lake systems should not be treated like backyard fountain kits.
We carry lake fountains, PondSeries® aeration systems, compressors, diffusers, and other equipment designed for larger bodies of water.
Your winter plan depends on the equipment, water depth, diffuser placement, compressor setup, climate, and manufacturer requirements.
What Should You Do With a Fountain Pump in Winter?
For many fountain systems in prolonged freezing climates, remove the pump, clean it, and store it somewhere it cannot freeze.
Several of our systems use pumps that should be stored submerged in a bucket of water. Keeping the appropriate pump wet helps protect seals and can help prevent the impeller from sticking.
Because pump designs vary, always follow the storage instructions for the pump or fountain kit you own.
Should You Drain a Water Feature for Winter?
Drain the parts where trapped water can cause freeze damage. Do not automatically drain every buried reservoir.
Components that commonly need to be drained or protected include:
- Ceramic vase interiors
- Above-ground tiered fountain bowls
- Brass bowls and supply lines
- Copper tubing
- Exposed plumbing that could trap water
Many of our buried fountain and pondless reservoirs are designed to remain partially or fully filled through winter. The water helps counteract pressure from surrounding soil as the ground freezes.
So instead of asking, "Should I drain my water feature?" ask, "Which parts of my water feature need to be drained?"
Watch: Outdoor Fountain Wintertime Challenges
Winter damage usually happens because water becomes trapped where it shouldn't.
In this video, we explain some of the problems outdoor fountain owners need to consider before freezing temperatures arrive.
Watch Outdoor Fountain Wintertime Challenges on our YouTube channel »
Fall & Winter Products We Recommend
For Fish Ponds
- Deluxe Pond Netting — keeps leaves and debris out before they reach the pond bottom.
- Economy Pond Netting — economical seasonal leaf protection.
- Floating Pond Thermometer — helps you base feeding and treatment changes on actual water temperature.
- Sakana Spring & Autumn Pellets — cool-water fish food for 45°F–65°F water.
- Spring & Fall Clean Bacteria — cold-water bacteria for seasonal leaves, muck, and sediment.
- 2-Outlet Pond Aeration Kit — backyard pond aeration for ponds up to the product's rated capacity.
- 4-Outlet Pond Aeration Kit — four-outlet aeration for larger backyard ponds within its rated capacity.
- Thermo-Pond Floating De-Icer 3.0 — thermostatically controlled winter de-icing.
Shop All Fall & Winter Pond Maintenance »
For Fountains and Pondless Waterfalls
- Fountain Covers for Vases and Urns — helps prevent rain, snow, and meltwater from collecting inside vulnerable vessels.
- Fountain Water Treatments — helps manage fountain water and reservoir maintenance during the operating season.
- Installation & Maintenance Manuals — model-specific information for our ponds, fountains, pondless systems, and Formal Falls®.
Fall & Winter Water Feature FAQ
When should I winterize my pond?
Start before prolonged freezing weather arrives. Install netting before heavy leaf drop, remove excessive debris, and use actual pond-water temperature to guide fish feeding and seasonal treatments.
When should I stop feeding koi and goldfish?
Use our Sakana Spring & Autumn Pellets between 45°F and 65°F water temperatures. Stop feeding when the water falls below 45°F.
When should I start using Spring & Fall Clean?
Begin applying Spring & Fall Clean Bacteria once per week when the pond water drops below 55°F.
Should I completely clean my pond in fall?
Not automatically. Remove excessive leaves, dead plants, muck, and clogged debris, but a full drain-and-clean isn't necessary for every healthy established pond every fall.
Can koi and goldfish stay outside all winter?
They can overwinter in a properly designed pond when depth, water quality, climate, aeration, and gas exchange are appropriate. If you're unsure whether your pond is suitable, get advice before it freezes.
Does a pond de-icer heat the whole pond?
No. Its main job is to maintain an opening in the ice for gas exchange.
Can I run my waterfall all winter?
Sometimes. If you do, inspect it regularly because ice can redirect water outside the liner and lower the pond or reservoir level.
Do I drain my ceramic vase fountain?
Drain the ceramic vase so water can't freeze inside it. For our current ceramic vase fountain systems, do not drain the buried basin for winter.
Can a GFRC fountain stay outside during winter?
Our handcrafted GFRC fountains are designed for outdoor landscape use, but you still need to properly winterize the pump and basin. Follow the instructions for your exact fountain kit.
Can a real stone fountain stay outside?
The stone may stay outdoors, but the pump, plumbing, fittings, lights, and basin still need appropriate winter care.
Should I cover my outdoor fountain?
It depends on the fountain. Ceramic vases that remain outdoors should be protected from water accumulation. Tiered cast-stone fountains also need winter protection. Follow the instructions for your specific fountain type.
Do I drain my underground fountain basin?
Not automatically. Several of our buried fountain and pondless systems should remain partially or fully filled through winter to help resist freeze/thaw ground heaving.
What should I do with my fountain pump?
For many of our systems in prolonged freezing climates, remove and clean the pump and store it somewhere it cannot freeze. Follow the storage directions for your specific pump.
10 Winterization Mistakes We Want You to Avoid
- Waiting until the pond is full of leaves before installing netting.
- Feeding fish based on the calendar instead of water temperature.
- Leaving excessive dead vegetation or organic debris in a pond.
- Thinking a pond de-icer is supposed to heat the entire pond.
- Leaving vulnerable pumps or plumbing full of water through prolonged freezing weather.
- Allowing water to freeze inside a ceramic vase.
- Allowing water to freeze inside copper or brass plumbing.
- Completely emptying a buried basin when its instructions say to leave water in it.
- Assuming every fountain material requires the same winterization procedure.
- Shutting down a water feature and never checking it until spring.
Not Sure Which Procedure Applies to Your Water Feature?
We've put our product-specific installation and maintenance information in one place.
Visit Our Installation & Maintenance Manuals »
You'll find information for ceramic vase fountains, real stone fountains, handcrafted GFRC fountains, metal fountains, Crystal Sphere fountains, Sugar Kettle fountains, Formal Falls®, pondless waterfalls, pond systems, and more.
If you're still unsure, contact our Sales & Tech Team before freezing weather arrives. We'd rather help you winterize the system correctly than help you replace something damaged by ice.
Prepare It Now. Enjoy an Easier Spring.
Good winterization isn't about doing the same thing to every water feature. It's about knowing where water can safely stay, where it needs to drain, what equipment needs protection, and what needs to keep working through winter.
For a fish pond, focus on leaves, water temperature, fish care, aeration, and gas exchange.
For a ceramic vase, never let water freeze inside the vessel.
For GFRC and real stone fountains, protect the pump and follow the instructions for the fountain and basin you own.
For metal fountains, don't leave water trapped in vulnerable bowls, tubing, or plumbing.
For a pondless waterfall, either monitor it carefully while it's running or shut it down correctly—and don't automatically empty the underground reservoir.
Most importantly, don't blindly drain every water feature just because winter is coming.
When warmer weather returns, use our Spring Water Feature Start Up Guide to clean, inspect, refill, and get your water feature flowing again.
Shop Fall & Winter Pond Maintenance »