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Re: Aquatic Plants Digest V4 #1473

Forgive my laziness.  I could have said something much sooner.  The 
acetic acid is also antimicrobial where the HCL is not.  I.e Low pH is 
inhibitory if is low enough.  But the inhiibitory value is higher for 
organic acids than inorganic acids.

> Date: Sun, 16 Dec 2001 14:07:12 -0600
> From: "Waters, Brian Matthew (UMC-Student)" <WatersBM at missouri_edu>
> Subject: Re: PMDD modification, acetic acid
> : " . . . 5ml of vinegar to 400ml of dilute prepared PMDD (for an automatic
> doser) will drop the pH 
> down to about 4.2 (YMMV), and that is plenty low to stop just about
> everything" (from growing)
> ==>Actually, many, many, microorganisms can thrive at pH 4.2.  Yeast for
> example, and about any other fermenting microbe.  I'm glad your mold problem
> is gone, but I can't see how the pH could be the reason.