More accurate. I never had the Hanna Ca Checker because of the bad reviews. The Salifert is easy to read, the color change is clear.
Another vote for Hannah Ca test sucking. I'm never really confident in the results, mostly because it relies on me not messing up, and messing up is easy.
Does anyone recommend this product for testing or would you guys go with the Hannah Checkers better?
Looking on advice about which one to get
thank you
Salifert is much better for Ca, although I'm not crazy about the dropper on one of the bottles.
Hello Everyone,
Thank you for using our products and for your feedback. We appreciate your comments and wanted to make ourselves available for questions relating to water testing. We have made some improvements to the Calcium Checker. Our phosphate/phosphorus and alkalinity Checkers are always well received and have very little complaints regarding the units.
We apologize for any inaccurate readings you may have experienced with our Calcium Checker. Our HI758 Calcium Checker uses a 100 to 1 dilution to analyze calcium. It is important to make sure you are using the new
HI731339P volumetric pipette to administer saltwater sample to the cuvette. Any increased or decreased sample size will result in inaccurate readings.
In addition, it is best to use
deionized water with very low conductivity when zeroing the Checker at C1 phase. Calcium can be found in many freshwater sources and any amount present in the original freshwater used can lead to inaccurate readings. If you are using your own RODI water, make sure to use a calibrated TDS meter and test the water in your reservoir, not just the output of your inline monitor fixed onto the unit. Its possible that ionic particles make their way back into your storage tank.
Also visit our blog to make sure you are following our
8 checker best practices such as indexing the cuvette in the same position every time, removing any air bubbles, finger prints or smudges and using separate pipettes/syringes for freshwater and saltwater.
A big advantage to using our Checkers compared to other testing instruments is each Checker is based off of a standard method in chemistry. Each Checker is designed for a single parameter measurement. All of our Checkers are based on chemical methods with a specific wavelength. For example, the
HI772 Marine Alkalinity dKH Checker has a LED @ 610 nm while the
HI736 Marine Ultra Low Range Phosphorus Checker has LED @ 525 nm. Each method requires a specific wavelength for maximum accuracy and repeat-ability. This is why all of the Checkers are sold as individual kits, versus selling one unit that measures all parameters. This is also why o
ur more expensive bench-top photometers use multiple filters/light sources to produce numerous wavelengths to measure different parameters rather than using just one NM wavelength to test everything (our HI83303 Aquaculture Photometer uses 5 LEDs with 420 nm, 466 nm, 525 nm, 575 nm, and 610 nm narrow band interference filters). All of our reagents come with MSDS sheets for proper storage and handling instructions.
We own our own manufacturing plant and do not outsource production like many other companies do. We are still a privately owned family run organization with operations in over 65 countries. When you buy Hanna you are getting testing equipment from a company that supplies analytical instruments to over 15 major industries ranging from metal plating, food production, marine research institutions, aquaculture, wastewater treatment, environmental monitoring, agriculture, brewers, wine makers and more.
Thanks for the feedback everyone, we strive to provide the best testing experience for all of our customers and encourage anyone to reach out if they ever have problems with your analytical instruments. Feel free to DM us or contact
[email protected] or call 877-My-Hanna.
