The more I think about it, I should have had a more informative answer than "read this..."
Since I've "tried" the ZeoVit method, I'll give you an overview and some of my observations as well as clearly just
my opinion.
just as BeanAnimal had suggested, it is a way of tank husbandry that tries to get your reef environment to 0 nitrates and 0 phosphates while promoting beneficial bacteria to propagate in your tank. By reducing the the amount of nutrients in your tank, the ZEOVit method claims that SPS corals will need less zooanthellae to prtect them and therefore will become less brown and more colorful.
There is a board that is very informative if my explanation needs more clarification
http://www.zeovit.com
initially, there is what ZeoVit calls "the Basic 4" which consists of...
ZeoBAK-
a Planktonic bacteria that provide corals with nutrients
ZeoFOOD7-
ZEOfood increases bacterial growth that supplies corals with all necessary elements
ZeoSTART2-
ZEOstart accelerates the cycling process and aids in the reduction of nutrients in your tank
ZeoMedia -
ZEOvit consists of three different sized untreated and all natural Zeoliths that will safely remove nitrate and phosphate from the aquarium
There are also allot of other additives that are part of the ZeoVit method that are recommended but not nessesary.
The PDF link that I added above will go into dosing recommendations etc... of these "Basic 4" and other additives.
ZeoVit "Highly recommends" that you use
Their Salt Mix and Their Carbon which are very expensive, and they claim that you will get better results....
That's kind of the basics on this system, now on to my observations and
My Opinion ...
I did not see any significant improvements on my water quality as my regular husbandry did not change. What I did see was that I lost ALL of my SPS corals to RTN and my softies / LPS corals did not open as well as they had prior to ZEOvit. Keep in mind I followed their directions to the "T". Also, my tank did not look as good as it did prior to ZEOvit and still looks like %^&# as it will take some time to recover.
AS long as you utilize efficient heavy skimming, change carbon weekly, weekly water changes and maintain your tank as you normally would ( I'm very meticulous about husbandry ) there is no reason you shouldn't see the same results in your reef.