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biogenic decalcification?

To: <Aquatic-Plants at actwin_com>
Subject: biogenic decalcification?
From: "L. Merrell" <merrell at u_washington.edu>
Date: Sat, 10 Mar 2001 16:00:37 -0800 (PST)

Hi. I posted a few days ago regarding my red melon sword with distorted
leaves. I measured my various water parameters today and found that my dKH
had dropped from a usual level of 4-5 down to 1 dKH. Could this be a case
of biogenic decalcification? My other plants include: cypts, duck weed,
azolla, glosso, rotala indica, bacopa carolinia, a red lotus and various
swords.  Should I simply to a water change and watch the KH closely or do
I need to dose with a carbonate source? Sodium bicarb or calcium
carbonate?
Thanks, Laurel

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