Annnd another update:
More snow has fallen. Neighbor said we have 3' on the driveway. Not so much on the lake as wind usually keeps it blown off. More snow inbound.
Quad hole by shore and fallen trees is open, but it looks a little slushy which makes me think it is struggling some.
Single hole by the standing dead tree is open, but also might be slushy.
Koenders hole is open, but has gotten smaller.
Close dual is basically closed. This is the only diffuser with no type of obstruction to deter ice from doming up.
The far dual with the pipe is open and getting bigger everyday!! It is the darkest color which means open water for sure.
Hopefully some DO data coming soon.