Re: [GSAS-Member] Dolomite and alkalinizing buffers

[haika@drizzle.com]

Chemistry is one of my weakest subjects. But...aren't the water
conditioners many of us use formulated to tie up heavy metals as well?

Betty Goetz

> Regarding dolomite or other alkalinizing buffers:
>
> Apparently, dolomite varies in lead and other heavy metal content.
> I did not learn if any dolomite sources are low enough in toxins
> to warrant their use, but I did learn from one study
> (http://ehp.niehs.nih.gov/docs/2000/108p309-313scelfo/abstract.html)
> that 2/3 of ALL calcium supplements have higher lead levels than
> allowable
> by federal standards, they just don't require testing, so they are on
> the
> market.
>
> I think oyster shells would be a better alternative to dolomite. Even
> they
> may be contaminated, depending where they come from. Another advantage
> is that it is a more renewable resource.
> The best alternative may be a powdered mineral supplement powder, or
> refined
> calcium carbonate powder and epsom salts, although that would lack the
> important trace minerals.
>
> Can anyone recommend a source of high quality oyster shells or
> seashells?
>
> John
>
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