Strontium

jerry11901

In Memoriam
Hello. I am working on chemistry in my 20g. Have few soft corals and few small fish in it. I am using Salifert testers.
Calcium 420 ppm
Alkalinity 9.0 dKH
Magnesium 1350 ppm
Strontium?
Yes here is my problem, trough the last 5 days I am adding teaspoon of strontium from Seachem each day, and test reading are 0. In the 9 step, color turns blue after adding only two drops of Sr-3.
Is it possible? Does anyone use strontium tester from Salifert?
Jerry
 
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