Pond Heaters & Anti Ice Devices
Pond Heaters & other Anti Ice Devices are often looked upon as an unnecessary luxury but in fact, quite the reverse is true. Employment of one of these devices is essential if you wish to ensure the survival of pond fish & other pond inhabitants such as frogs, in periods of particularly cold weather.
Even the electronic "Pond Heaters" do not try to heat the water, their purpose is to keep a small area free of ice. This literally allows the pond to breathe, toxic gases such as Carbon Dioxide & Methane are allowed to escape whilst oxygen can be absorbed.