Phil

Found some posts that may be of interest to you.

http://www.pondboss.com/cgi-bin/ubbcgi/ultimatebb.cgi?ubb=get_topic;f=7;t=000426

http://www.pondboss.com/cgi-bin/ubbcgi/ultimatebb.cgi?ubb=get_topic;f=7;t=000429

Hopefully NE Mason will see this and comment. If not, try to email him. He has a beautiful trout pond in NH.