Yep, zeohead here
In 2008 I got board, and tired of battling with my nitrates and decided to give zeovit a try.
With the great help from a few people (one of our own, boomer being one of them) I ventured into the world of probiotics.
Basically the purpose of the system is to create a low nutrient, near natural levels, environment.
The goal is to reduce measurable levels of nitrate (NO3) and phosphate (PO4) without
lowering the levels of important minerals, like calcium (Ca), magnesium (Mg),
Potoassium (K+) and carbonate hardness (KH), such that addition of these trace
elements is minimal.
The zeolite are used for not only filtration (heated topic) but also provide an ideal surface area for bacteria to populate on. This "mulm" growth is then released by agitating the stones and providing food for the corals and distributing the bacteria throughout the display tank.
There is a carbon source dosed daily along with possibly food, for the bacteria and trace elements that can be use to target colors in the coral tissue.
Heavy skimming is involved along with the strict regiments of GAC.
I am currently building a zeovit system for growing out corals. 60 gallons, perfect size for the slow economy and my hurting wallet.
Zeovit has come a long way in the past few years and now you can even use it to cycle a new system in 14 days. I will be learning this method and explaining it as I go in a few months after I finish my build. You can follow along in this thread here:
http://www.reeffrontiers.com/forums/f13/60-gallon-frag-system-build-58022/
The nano beast