I am experiencing a new situation with a floating pond de icer. I have been using one of these for the past several years in keeping a hole open in the ice. I bought a new one this year and put it in a few days ago and it is generating a situation that I have not seen before or with the older de icer. There is a ring of Green foam like stuff completely around the dome of the de icer (about 2" wide) and also completely coating the bottom of the de icer. I brought the de icer back and got another one and will put that in when the temps drop down again (now in the 40's) around here and see if the problem goes away. They talk about a Lime buildup on the de icers sometimes after awhile and you have to clean them with vinegar and brushing so it doesn't effect the performance of the de icer. But this started imediately or shortly after the initial usage. Anyone have any idea what that green foamy stuff might be generated from? Thanks