Hate to break it to you guys, but the term 'cost effective' wasn't coined until 1988. Sure that was one year before AnthonyPool got his, but the filter design was a couple of years old already. It predated 'cost effective' and will out live us all. Ooooooooooooooooooh........ there's an idea !!!!!! An Urn.
(No time soon. Waaaaay in the future)
(No time soon. Waaaaay in the future)