In case you’ve been putting it off, it’s time to plan what you will do with your pond this winter.
Will you shut it down or keep it running?
Do you need supplies?
What are you doing with your fish and plants?
Here’s some advice to help you out.
Pond Shut Down
Many people try to choose a warm day to close down their ponds. At this point in the fall, your pond water temperature will be pretty cold, no matter how warm the sun feels. Be ready for that brisk chill on your arms and legs as you work. For your comfort and safety, we recommend waders.
Plants
Hardy plants, such as lilies that are in their pots, need to be cut back to just two-inch stems, then placed at the deepest part of the pond. This is the least likely spot to freeze. Any zone 5 plants can be cut back and over-wintered at the deepest part.
Hardy plants that are planted in the pond edge will tolerate our winters. Cut them back to two inches as you would do with your garden perennials or leave them as is for winter interest, it’s your choice.
If you plan on keeping your tropical plants, bring them indoors and place them in plastic containers (ice cream buckets work well) in front of a bright window. These need to be kept wet at all times. Treat them like house plants.
Pond System Maintenance
Pull out all the filter mats, lava rock or bioballs and everything in the biofalls where your waterfall starts. Rinse everything off as well as you can, let dry and store in the garage or shed. Storing these things in a marked plastic storage tub makes it easy to find next year and helps prevent critters from using it as bedding.
The skimmer where your pump is housed is next. Pull out the mats, leaf basket and pump. Clean everything off. Bring the pump into the house and store in a bucket of water. Let the other items dry and store with the things from the biofalls.
Leaves

To make spring clean out easier, you’ll want to reduce the amount of leaves that end up in your pond this fall. You can use a long handled net to scoop out leaves on a daily basis (or as close to daily as you can get), or cover the pond with leaf netting until the leaves are done falling. Leaf netting should be shaken daily (or as close to daily as you can get) so the weight doesn’t make more work or mess for you.
Fish
Use a pond thermometer to measure the water temperature, and when it reaches 65 degrees change your fish food over to a Cold Water fish food. You may notice that your
fish stop eating as we get further into fall, and that’s normal. Stop feeding your fish when the water gets to 55 degrees.
If you plan on keeping your fish in the pond, you’ll need to maintain an opening in the ice for oxygen exchange. One way to do this is to place a small pump on the first shelf that drops down into your pond and position it so that it bubbles up. When the pond eventually freezes, it will create an ice dome that you will have to gently break to maintain your opening. You can also use a cordless drill to create holes in the ice dome to help keep it open. Either way, be careful so you don’t puncture the pond liner! When the temperatures get down around zero degrees you will need to install a de-icier or pond heater to help keep the pond open.
If you bring your fish inside, you can let your pond freeze over. To bring your fish indoors you’ll need some supplies.
- Any container that holds water, the easiest is a stock tank either rubber or metal. You can use a Rubbermaid container, but make sure you frame it up with boards so the water doesn’t collapse the sides and drain out.
- Some rocks to cover the bottom.
- A small pump or aerator for oxygen.
- If placing in the garage, you’ll need a pond heater or de-icier.
- An overhead light.
Keeping You Pond Running

If you decide to keep your pond operating and enjoy it till the first snowfall, pull out the filter mat but leave everything else in the skimmer box so it continues to function. As the system pulls in leaves and debris you will need to clean out the basket or debris netting daily so it does not plug up. When you’re ready, follow the instructions to shut down your pond.
You can run your pond all winter, if your stream is wide enough. During extreme cold there may be a tendency for ice dams to develop, leading to water loss over the edges. Keep an eye on your stream and water level and be ready to add more water due to evaporation and water loss over the sides.
Supplies and Assistance
If you need any of the supplies listed, visit a Hedberg Aquatic Addiction pond store. We specialize in all things pond related. If you would like a professional to come out and winterize your pond, please call us at 763-225-0589 and we’ll line you up with a qualified contractor.
Enjoy your pond over the winter! It’ll be spring again before you know it.