Make the pond at least 4-feet deep by 4-feet wide. This helps to prevent the pond from freezing completely.
Keep the water flowing with a filter, a waterfall or an air stone that emits bubbles. Moving water is less likely to freeze. All devices that keep water in motion need an electrical outlet.
Install a water heater. Two heater options for ponds are an underwater heater placed in the pond or a larger heater that sits outside the pond. Heaters work using electricity or gas to heat the water, depending on the type of device used. Heaters set outside the pond remove water from the pond, heat the water and send it back. The instructions on the pond heater will need to be followed to determine what setting to use throughout the winter. When temperatures are colder you will likely have to adjust the heater setting as per the manufacturer's instructions.
Use a pond de-icer. These are electrical floating heaters that create a large hole in the ice to release toxic gases and allow fresh air to enter the pond water.
Things You Will Need
- Large and deep pond
- Air stone or pump
- Watch for the formation ice dams on any waterfall structures that will cause water to splash out of the pond.
- Another option is to drain the pond and bring fish indoors.