Pond Heater in Your Fish Pond?
In severe climates and shallow ponds, the recommended solution is to bring the fish into the house for the winter.
Small Heater Option
Having said that. There is a small heater, often referred to as a stock-tank heater because it is used by farmers to keep watering troughs open – that floats on the surface of the water and will keep a very small hole open through the coldest winter.
These are readily available on the Net or through a farm-supply store.
Larger Units
Larger heating systems for the dedicated, cold climate, fish ponder involve hooking up a swimming pool heater to the pond. These are available from a local swimming pool dealer. While I have never used such a system, I’m told it works well but the plumbing should be set up to bypass it in the summer so as to keep it fairly clean during the “dirty” summer months.
Another Option
Another alternative that is inexpensive and does not involve purchasing other supplies is to disconnect your pond pump from the filter, put it the lowest section of the pond and turn it on. The water flow will keep a section of water ice free. Adding a discharge pipe that points straight up is a preferred way to keep the water free in very cold climates.
You can also use an air bubbler system to keep a hole in the ice. Do not use an air stone with this system, your objective is to roil the water in one place, not to add multiple air bubbles.
In short, most fish ponds do not require pond heater systems unless they are fully stocked, in a very cold climate and have a shallow pond.
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