I have seen one once, I'll look around and find out what I can.


Took a look here is a link:

http://forums.saltwaterfish.com/vb/s....php?p=2401854
http://forums.saltwaterfish.com/vb/s...d.php?t=288154
http://www.aquaticplantcentral.com/f...ge-system.html
http://www.angelfire.com/ab/rayjay/DIYoverflow.html
http://www.youtube.com/watch?v=kjSLP...eature=related

Willpost more if I like them.
Bill