George, I've never used a plenum myself, and nitrates were a big problem
for the first few years I kept tanks. Then I figured it out:
http://www.melevsreef.com/reducing_nitrates.html

Currently, I have a 280g reef with a 3" to 4" sand bad (it varies), and
nitrates are around 1.5 to 2.5ppm (pretty darn low).
http://www.melevsreef.com/parms.html

Plenums are still used by some today, but for the most part I believe
many have chosen not to use one.
Marc


George Pontis wrote:
I read a basic description of the Jaubert Plenum for nitrate reduction, in Kurtz's
"Simple Guide to Marine Aquariums". The idea sounds good on paper, but I wonder if
it has withstood the test of time. Anyone using the system, or comments on the
effectiveness of it ?

George

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