Originally Posted By: Journeyman
Not sure about the 'large bubbles' are better for ice info you suggest, but I can tell you my experience with vertex in cold weather.

The deep water diffusers are shut down for winter, and running only one Vertex dual unit in 6 feet of water. This winter in Wisconsin has been colder than usual with many days below zero and windchills of more than -50f. The open water averages close to 30 feet across seasonally, and narrows up to about 15 feet across for the brutally cold weeks. It reopens to 30 feet within days of getting above zero.


The larger bubbles do not move as much volume of water as fine bubbles, yet the larger bubbles (still small) rise faster and splash warmer bottom water, higher onto ice.....compare it some time if you get the chance...