Getting ready for my fisrt winter with a pond

Hi,

I just have a few questions for the group concerning winterizing:

1. To run the waterfall or to not run the waterfall...
Pros: ensures a hole is available for stuff to get out if pond freezes...
actually, waterflow should reduce chances of pond freezing
Looks pretty
Water tempature should be higher than if not run (true?)
Cons: Still paying electrical cost
Waterfall may freeze at parts, causing water to go outside of pond
--Is this really true? As a decent flow rate how does it freeze?

2. When to stop feeding...
-- Reports range from 55 to 45 degrees
--- at what depth do we concern ourselves with..(1' temp != 3' temp)


Bonus question:

a) I know water flow effects water tempature -- could someone explain how?


Nasa