Howdy folks! As we all know, there are many different ways people Winterize their pond. Of course, there are a few key principles that should be followed, but many ways to successfully accomplish them. First, you want to start the Winter with clean water, i.e. 0 ammonia and nitrite, and low levels of nitrate. This could be done with a water change or just through good filtration. Second, you will want to remove as much solid debris from the pond as possible. It would be advisable to remove all leaves and flowers from plants that will not survive the Winter, and net out all leaves etc. Third, you will want to keep a hole open in the ice for gas and oxygen exchange. This can be done with a heater, an aerator, a water pump, or even a breather. Some people even cover or insulate their pond, to keep their fish toasty warm.
What do you do?
Personally I do a 50% water change with well water and use a net to scoop out leaves. I cut off all plant growth, sink them 2' down, and then use a 300 gph water pump to make a small "volcano" of water at the surface, to prevent a complete freeze. My main pump goes off, so none of my normal filter are running. The 300 gph filter is in a small filter box. I have done this for 2 Winters successfully.
What do you do?
Personally I do a 50% water change with well water and use a net to scoop out leaves. I cut off all plant growth, sink them 2' down, and then use a 300 gph water pump to make a small "volcano" of water at the surface, to prevent a complete freeze. My main pump goes off, so none of my normal filter are running. The 300 gph filter is in a small filter box. I have done this for 2 Winters successfully.