WOW that dude has way to much time on his hands. I read and skimmed through the whole thread and could not quite get what a RDF is. Some type of a filter but could not quite get how it really worked.

[Linked Image from corvettejunkie.com]
http://www.pondboss.com/subscribe.asp?c=4


7/8th of an acre, Perch only pond, Ontario, Canada.