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Re: [APD] GYPSUM
(Off the aquatic plants topic), I was advised to use gypsum in my garden as
the water which is used to water the plants is hard salty boring water.
What would be exactly the purpose of adding gypsumn to the soil in this
> Message: 6
> Date: Wed, 17 Aug 2005 17:23:42 -0700 (PDT)
> From: "S. Hieber" <shieber at yahoo_com>
> Subject: Re: [APD] Re: CaCl2, CaSO4.
> To: aquatic plants digest <aquatic-plants at actwin_com>
> And calcium sulfate (gypsum) does not affect pH or
> alkalinity levels of the water. However, note that some
> calcium sulfate is not "mined" but is produced as a
> by-product of the manufacture of phosphoric acid, in which
> case it can have some some residual acid, which can lower
> the pH. If in doubt, take some water with a known pH and
> dissolve some of the calcium sulfate in it and then check
> the pH again.
> I believe it was David Lass that first clued me in re
> calcium sulfate.
> Good luck, good plants, good fun,
> Scott H.
> --- Thomas Barr <tcbiii at earthlink_net> wrote:
> > "Regarding
> > calcium chloride, I experienced trouble both times I used
> > it. Red plants
> > turned greenish, spotted leaves loosed contrast, stunted
> > grow. It took some
> > weeks to recover.
> > Mariano"
> > Try CaSO4, gypsum, fine ground. This will not have the
> > same impact but is slower to dissolve.
> > Regards,
> > Tom Barr
> > _______________________________________________
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