Using a Hanna Calcium Checker

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Awesome video. I love my new line of checkers too.

Mauritianman
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just tried the hanna calcium checker....i don't know if I'm doing it wrong but my readings is off the roof 495 twice...then i used the red sea test and it was 370, , , what a big difference

brinks
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The calc checker, has always sucked. Bought it, used once or twice and went back to the Salifert.

Nvizn