Hi Al!
Welcome to RPM!

I found this interesting article here
http://www.ext.vt.edu/pubs/fisheries...3/420-253.html
(it even includes a recipe...)

I'd be interested to know what you think of the
advise they offer.

k :-)

http://tinyurl.com/6bguh ~ new pond keeper info
http://tinyurl.com/yp64db ~ slide show of pond