I saw a poll on the depth of LS and thought that the results were interesting. With the LS poll in mind, I posted a R/O poll on the Nano Tank forum.
R/O Poll
http://www.canreef.com/phpBB2/viewtopic.php?p=97785
LS Poll
http://www.canreef.com/phpBB2/viewtopic.php?t=12094