OK, big temperature drop this morning, went from just above freezing at 4am to 5 degrees F. The cold Arctic wind reached out it's long icy fingers and touched the pond this morning, now it looks mostly froze, so I turned on the Heater just now.
If you are planing on wintering pond, don't forget to check water level under the ice, as water level can drop during sudden freeze up as water is displaced into ice. Keep spare hose handy in basement.
This waterway drop from the top pond to the middle pond is just starting to form an ice shell this morning. It can look "messy" as water will splash a bit until ice shell completely formed. Water will then flow nicely under the shell,