HI 758 Calcium Checker HC is supplied with 2 sample cuvettes and caps, reagents for 25 tests, (1)1.5V AAA battery, and instruction manual
Range 200 to 600 ppm
Resolution 1 ppm
Accuracy @ 25C 6% of reading
Light Source light emitting diode @ 610 nm
Light Detector Silicon Photocell
Environment 0 to 50 C (32 to 122 F); max 95% RH non-condensing
Battery Type (1) 1.5V AAA
Auto-off after 10 minutes of non-use
Dimensions 81.5 x 61 x 37.5 mm (3.2 x 2.4 x 1.5")
Weight 64 g (2.25 oz.)
Method adaptation of the zincon method
Customer Reviews
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A game changer for color blind people Dec 12, 2017
As a color blind person Hanna checkers are a godsend, I no longer have to guess when water samples are changing colors or ask for somebody to help me. However even people who are not color blind, testing calcium is no longer a long drawn out process that requires slowly dripping reagents from one vile to another and doing the math. A simple test procedure followed by easy to read consistent results is the greatest thing ever.
Hanna makes very good products Dec 11, 2017
I can't explain how Hanna checkers have made my life easier! I was spending over an hour doing all my tests and and converting over to Hanna has saved me a lot of time and made my testing much more accurate.
?? Oct 15, 2017
By far too many steps and complex are you comparing this to what other test kit? Are test results in question when the test is preformed correctly? Please elaborate a little more.
Time consuming Mar 20, 2017
Not as nice as alk and po4 hannah checker. Two complex with far to many steps.
Using the HI758 Hanna Calcium Checker
Hanna Instruments' Kevin Costa discusses the importance of calcium in your aquarium and how to maintain proper levels using the HI758 Calcium Checker from Hanna Instruments.
04/11/2018