On Tue, 11 Mar 2003 16:09:15 -0000, in rec.aquaria.freshwater.plants
"Marksfish" verruimde onze geest met:


I use Tetra kits.

peat will mess up (give a higher) KH because it brings weak acids into
the water which interfere which the acid titration of the commercial
KH kits.

For the moment no commercial kKH kit can give you the exact KH when
peat is used.

also citric acid (used to lower the pH) interferes with the
measurement.

I'm close to develloping a test which give you both the commercial KH
(which is in fact the acid absorbtion capacity) and the real KH. But
I need some chemicals to begin testing.

PérRµ§h

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