Well guys the old winter kill got my uncles pond again in Wisc. This is the second time in 8 years . THis time he unplugged his airrator to plug a tool in in the late fall and forgot to plug it back in . He has 1000's of dead fish laying on the bottom of his pond. he went over and looked at mine , he said he didn't see any fish at all dead or alive so i am taking that as a good sign . Hoppefully they are still somewhat dormant oon the bottom. i had my arirator plugged in all winter. Its not very big airrator but it opens a whole about 2-3 ft across in the ice.