I did this a while ago on Alberta Aquatica and it was published on Aquarticles. I thought it might be helpful here as well.
http://albertaaquatica.com/index.php?showforum=29
Mods please move this to the Diy section Thanx
http://albertaaquatica.com/index.php?showforum=29
Mods please move this to the Diy section Thanx