Yes - but- Ted I have a question on this pond. I agree with the aeration advice. This pond is in the first year of a struggle with Duckweed. Sonar worked well on the first stage. The aeration has been IMO a big part of the clean up success. DW does not do so well in moving water. Duckweed survives the winter by producing buds (called turion) that sink to the bottom of the pond. Here is the part I know very little about in Northern ponds. DW turions ( seeds that sink to the bottom and float up when conditions are right) like the top layer being killed off are an extreme survival adaptation that makes it hard to control . Aeration helps control this by the constant moving of water. Is there any experience or info on the ability of DW turions to float up during winter under the ice while the water is still and start growing?