Check out this website and get some ideas.
http://users.owt.com/jjspond/filters/myfilter.html

Cool, Snooze, I always wondered if there were a way to get to just a
certain page of my website. When I do it I don't see the URL change, so
don't know how to do this. Now that I know it is possible I'll bug computer
boy to explain.

As far as a filter for a 300 gallon pond, click on the link Snooze provided
above and scroll to the bottom. ~ jan

See my ponds and filter design:
http://users.owt.com/jjspond/

~Keep 'em Wet!~
Tri-Cities WA Zone 7a
To e-mail see website