The trout farm that I get my trout from has ponds that are lined, are shallow, and are about 1/10 to 2/10 ac each. They have at least one Kasco going in each pond all year long.
He does have to clean them 2x day during the Fall due to leaves clogging them. He has a rope tied to the shore from the aerator going to both sides of the pond. He just yanks the Kasco back and forth a few times to shake the leaves off of it. No going into the water.
