Bill :

Thanks for your post. It is the best possible proof that this forum in addition to being outstanding for its pond mgt. information is more importantly beyond measure as to the content of the character of those who staff it and post here. I join in Bill's thanks to you Bob for making this possible . In addition , thank you Bill Cody and Dave Willis for keeping our collective thinking sound and science based. You and the forum members combined sense of character are the reason this is the only forum I am involved in. Let us all strive to keep this a very special place. ewest