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Discussion Starter · #1 ·
Hi. Today i did an experiment with my tap water.
My tap is 120 ppm EC. german hardness 6-7.Ph 8

First i added phosphoric acid to ph of 6. total ec stayed +/- same
then i added citric acid to ph of 6 . total ppm dropped from 120 to 90.

What is happening in my water solution with citric acid. Why does my EC-meter show a drop in EC with citric acid , why doesnt it with phosphoric ?
Has it maybe something to do with chelation ?
 
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