Quote:
Originally Posted by Myka
I don't like the Hanna Calcium checker -it always reads about 50 ppm higher than Salifert and Elos when I used it.
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*grumble*
Really? I was using a Red Sea test kit and it was waaaay off. I was measuring ~360 in my display so I started dosing kalk to bring it up. I could never get it higher than 380 - which I thought was weird. I tested the display yesterday and it was around 490 which was when I realized my Red Sea kit was out to lunch. I was expecting the Hanna checker to be a silver bullet.