RE: Lowering water pH

From: Mellard, David (dam7@cdc.gov)
Date: Wed Nov 12 1997 - 07:18:00 PST 

Date: Wed, 12 Nov 1997 10:18:00 -0500
From: "Mellard, David" <dam7@cdc.gov>
To: cp@opus.hpl.hp.com
Message-Id: <aabcdefg4316$foo@default>
Subject: RE: Lowering water pH

Hi Susan,

I have used vinegar (acetic acid) to lower the pH of water used for
orchids. If you don't have a pH meter, you can use pH test paper or a
kit from an aquarium store. I don't think the carbon in acetic acid
will harm cp's since they grow in a carbon rich environment.

David
 ----------
To: Multiple recipients of list

In our greenhouse production facilities, we have a few back-up
carnivorous plants to supplement those in our conservatory. In the
conservatory, we have a sophisticated reverse osmosis water system,
so the water is great. In the greenhouse, however, we just have a
little de-ionizing unit that fills up a trash can with "pure"
water for the cp's. However, it appears to only remove the
chlorine and the hardness of the water. It does nothing to
lower the pH of the water, and the tap water here in St. Louis is
about 9.0! Is there an easy way to lower the pH of the water
sitting in the trash can?

Thanks for any info,
Susan Farrington
Missouri Botanical Garden

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