Here are the plans I drew up and built last week, I'm sorry it didn't save to jpeg very well http://daah.info/index.php?board=16;action=display;threadid=1124 Another very good design I got some ideas from http://saltaquarium.about.com/gi/dynamic/offsite.htm?site=http%3A%2F%2Fu sers.rcn.com%2Freef101%2Fdiyhood.html Matt