I'm researching this Phoslock product as it sounds interesting. I'll let you know if i go with it. I'm wondering how affordable it is? I may just go the chemical route since it's so bad and try to keep it in check and hit it with an attack plan early next season. Raking it out at this point is out of the question unless I had a crew of 20 men armed with rakes and spent 10 hours or more. The pond is almost completely covered at this point and it's pretty thick. Thanks for all your help.