Calcium testing

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Albindia

Aquarium Advice Regular
Joined
Jan 14, 2013
Messages
89
Location
Boston
Is parts per million (ppm) the same as mg/lt. I'm using Elos test kit.
 
My lfs tested my calcium at 400 ppm on Saturday, I dosed Monday morning a half teaspoon of calcium and tested today, Wednesday and the reading came out
 
Reading came out at 10 drops or 250 ppm. This can't be right, right??
 
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