Planted Tank Obsessed
Join Date: Jul 2009
Location: Chicago, IL / Philadelphia, PA
I think that with an 18" deep tank, you're going to have a tough time even with low light plants at the bottom of the tank. You might want to consider the Ray II. There should be a chart showing the PAR data for the fugeray and RAY II fixtures at specific depths on the finnex website and/or in the finnex / schuber wright forum on this site.