While this is slightly off topic, I think I remember the conversation Marc and I had. I think we were discussing how viable it is for us to try to mimic the ocean. While in many ways I try to keep mine as natural as possible, it is virtually impossible to have an exact representation. Anthony Calfo is a big proponent of region specific stocking. He has talked at length about how much harder it is to keep species from different regions together as they have different needs. Most of us though want the coolest stuff from all over, and try our best to sustain them. I have never looked into Zeovit or any of the other systems as I have a pretty limited budget when it comes to reef keeping. So I try to stay as natural as possible. When I am diligent about it (which is not often since we got the kids) I do regular large water changes and make sure my skimmer stays clean to be as effective as possible. I measure my CA and KH to make sure it is stable and at proper rates and that is about it. When I am diligent I have had good success. When I have let things slide I have had issues. While there are many different ways to keep a successful reef, I feel the key is consistency and stability. When we get lax no matter what system we are running we usually pay for it.