Thanks Esshup...will move both double aerators into 3 feet of water [normal depth for pond is 12-13 feet over 50%] within the next 7 days; current water temperature at 24-30 inches below surface is 46F...the water has cooled from 55 in last 6 days...cold nights, down to high 20s and mid-40 days

it is easy to move the bubblers around 1/2 the pond; the surface floats allow quite easy lift and move