Reverse Osmosis Mineral Block?

Okay, I've got a question. Was wandering the net and have caught a few references to an add-in for RO systems that reintroduces necessary minerals into the water after it's been passed through an RO system. From what I've read it's supposed to be like a filter pack almost, and hooks into your water system on the downside of your RO system to put back in all the minerals that were removed out in the process of filtering. But I did some google diving on this and can't find anything on it, except more mentions of a system like that. Does anyone know if such a system exists commercially, or would this be a home brew solution using mineral blocks to solve the filtering problem? If it's home brew I'd like to find some info so I can build my own, and if it's not, then I'd like to find out who sells them. They'd come in super handy at our cabin and at the other places we have RO systems setup on.
Comments
http://waterus.com/alkalizer.htm
Don't know anything about the product/website.
-Bill
I am using such a system, a cheap one. That filter (we call it mineral filter) is appears to be plastic a container filled with some stone pieces (you get it when you shake it, there are stones).
Since I am measuring the output with a TDS meter, I can see it is adding something to water. The point here is, its not capable of adding minerals in a balanced manner. To get Ionically balanced water, it takes some time to settle balance, as far as I know (Im not an expert, just general knowledge). Therefore, I dont believe it equally replaces the good "old" water
Drinking pure water is bad idea. Dont recommend it for over few days. Lack of common minerals may easily disrupt the bacterial balance in the far end of digestion system
Agree completely and the Doc backing it up just proves it. Everything in moderation. I was never healthier than the 10 years I was at sea drinking RO water and rain.
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That is the reason we use it... arsenic is a tad high in our well water.
So I think you can get all the minerals needed from food .
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