i like saliferts, it works ok, but color charts always have a problem.
sound like salifert is your best bet however. it does the WHAM change from
pink, to blueish, and it is assumed that the WHAM change it what is to be
assumed the measure point. others wonder if you keep dropping solution
until its totally clear blue, which in my opinion will give inaccurate
results. Im not sure about sea chems, but saliferts is GOOD.

wolfhedd

"Pszemol" wrote in message
...
"Pszemol" wrote in message
...
I am using SeaChem calcium test and they also use titrate method.

http://www.drsfostersmith.com/Produc...133&in_merch=1
The point the measurment is ended for SeaChem test is when the color of
the
sample turns blue (originaly pink). The transition is rapid (one drop or
less).
You may note the amount you added and add more - if the coloro does not
change
the noted value is your reading.

Here you will find *.pdf file with complete, original instructions:
http://www.seachem.com/en_support/ki...40-Calcium.pdf