- Calcium Colorimeter HI758 Hanna Checker - Marine Water
Redesigned with new 100 µL Pipette
Accurately check your reef tanks calcium level with the Hanna HI758 Calcium Checker.
Three simple steps to results. The Hanna Calcium Checker bridges the gap between simple chemical test kits and professional instrumentation. Accurate, affordable and easy to use. First, zero the instrument with your water sample. Next, add the reagent. Last, place the vial into the Hanna Calcium Checker, press the button and read the results. Done.
Easier to use and more accurate than chemical test kits.
Tips for accurate results:
- Use Hanna HI740230 Demineralized Water
- Make sure testing vials are clean of any debris
- Vials must be dry on the outside with no fingerprints
- Violent shaking will cause microbubbles that can affect the reading
- Do not let the sample sit too long before taking a reading
New MiniPipette - The new mini pipette has a 2-stage plunger that will let you accurately dispense your 0.1mL tank water sample. The pipette is spring loaded and will allow you to retrieve and dispense 100 µL. Just attach the pipette tip, and press the button down until it stops the first time. Then place the tip into your tank water sample and slowly let the plunger spring back up. Move the pipette to your testing vial, and press the plunger down to the first stop to dispense the liquid it took in.
Dedicated to a single parameter - Designed to work with HANNA's liquid reagents. Uses 10 mL glass cuvettes.
- Range: 200 to 600 ppm
- Resolution: 1 ppm (mg/L)
- Precision: ±6% of reading
- Light Source: LED @ 610 nm
- Light Detector: Silicon photocell
- Environment: 0 to 50°C (32 to 122°F); RH max 95% non-condensing
- Battery Type: (1) 1.5V AAA
- Auto-off: After 10 minutes of non-use and after read
- 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
Weighing a mere 65 g (2.3 oz.), the Checker®HC easily fits into the palm of your hand or pocket.Use for quick and accurate on the spot analysis. Single button operation: Zero and Measure Operated by a single AAA battery.
Excellent piece of equipment By David on 5/4/2018David would recommend this product to a friendThis tester is easy to use and accurate. First thing I did when I received it was to check it against another test kit (Red Sea), the titration results were 400ppm and the Hanna checker showed 396ppm. I would call this accurate. Anyone not getting accurate results is not following instructions correctly. Again this is an excellent piece of equipment and I highly recommend this product.
Please watch Hanna's YouTube video! By Chel on 4/19/2018Chel would recommend this product to a friendReefers that are using the Hanna Calcium checkers that are not getting accurate readings, please go view Hanna's YouTube instructional video on how to properly use this checker. I was consistently getting high readings when compared to Salifert and Red Sea tested at the same time. I watched this video a while back and realized what my error was. Since I learned what my mistake was, it is spot on with the other checkers. Don't give up on Hanna just yet! It's a great product when used properly! Please JUST watch the video. Hanna's written instructions do NOT include the needed details to ensure everyone is using it properly! I thought it was clear and I thought it was common sense, too!
Hope this helps! Reef on!
Perfected By Patrick on 3/22/2018Patrick would recommend this product to a friendWith all the negatives about the .1ml of tank water I was hesitant about buying the calcium checker. However after buying it I ran 5 tests on the same water sample and my results varied only by +\- 4 ppm. I’ve concluded that the Hanna checker is an invaluable piece of equipment for testing my calcium. Ease of use, not having to guess if the color fully changed and price make this checker the best bang for the buck in monitoring my calcium levels. The new .1ml pipet works great compared to the older meathod and I’d recommend this to anyone
need some instrument knowledge but works well By Chris on 3/11/2018Chris would recommend this product to a friendThis is a good tool. I see a lot of negative, mostly on the complicated nature of the test, however, I am used to working with these type of instruments. If you learn to properly clean and wipe the cuvette, Pipette correctly then your test will be spot on.
great produkt By PETER on 2/6/2018PETER would recommend this product to a friendresults i trust most
DO NOT TRUST - Incorrect Readings By Jason on 2/5/2018Jason wouldn't recommend this product to a friendSalifert=300 - API=300 - Hanna=524(incorrect)
Being new to reef tanks, I purchased a lot of testing kits. I have had a lot of success with other Hanna checkers, but this one is terrible. I had a great deal of coral in a 72 gallon tank and slowly coral started dying. I tested all the parameters and everything checked out. It appeared my corals were missing calcium as the would just fall apart, but the Hanna calcium checker kept reading over the normal value (high). I had my water tested with triton and it showed very low calcium. I confirm the triton reading with API and Salifert test kits. DO NOT TRUST!!!!
Takes some getting use to, but it's doable By Matthew on 1/31/2018Matthew would recommend this product to a friendI've only run a few tests so far, and there is a learning curve on this, but take your time, mess up a few times, and keep testing. I think it'll take me a little while to get the hung of it entirely, but it's a nice, albeit complex, kit.
Very Accurate if you use distilled water By Matt on 12/31/2017Matt would recommend this product to a friendThe difference for me was to use distilled water instead of DI water. I live in the high Rockies on well water and have had our water tested, no calcium and very little other impurities are present. When using my DI water and following the instructions my readings were 50-75ppm high. When I used distilled water my readings were in lockstep with my Salifert test kit. Tested multiple times to validate. So make sure to use distilled and follow the instructions very closely. It is worth watching the Hanna video to ensure your are doing it correctly.
Inherently flawed and not precise By James on 12/8/2017James wouldn't recommend this product to a friendI have the Hanna Alk and Phos tests and they're great; this one is not. It's inherently flawed. It has you had 0.1ml of tank water to 10ml of reagents and RO/DI water. Any slight problem with drawing up such a small tank water sample and your results are going to very widely. I don't find that the mechanical pipette they include to be very precise. I've gotten back to back results that differ by over 100 ppm. Prior I was using the Salifert Ca+ test and I'm going back to that. It's much more reliable and precise as well as simply quicker and easier.
Seems to give a ballpark By William on 11/26/2017William wouldn't recommend this product to a friendI think its just too hard to perform this test precise enough to be accurate. I read 401 1 day, then without any dosing read 441 the next day. To me the calcium is important and I end up doing a manual test anyways. I would not buy again. The other Hannah product are amazing, but this one falls short.
Great if you get it right By Dmize on 11/19/2017Dmize would recommend this product to a friendI found that if you are not very precise in your measurements it will easily read off the scale. However that said if you get everything relatively on target it will read accurate enough for my LPS/fish tank.
use RO water to clean cuvettes!! By phil on 9/21/2017phil would recommend this product to a friendJust got an article from Hanna saying to clean the cuvettes with RO/DI water and NOT tap because the tap water has calcium in it!! So I thoroughly cleaned them with RO water and my high (542) reading went away and got my usual 480 reading!!! So use RO water to clean!
Starting at: $9.44
Is this the redesigned version with the new 0.1ml pipette?
Have a great weekend!
From Hanna's official video (link attached) of this checker in 2016, it comes with a 0.1 ml pipette for adding the sample water. Does the checker sold at BRS comes with the pipette or green syringe?
https://www.youtube.com/watch?v=OG1cliQjDZk pipette shown at 0:50
Have a great weekend!
Are the reagent packets really that hard to open and get into the vials?
It seems that the biggest/only gripe about this unit in the reviews is that it uses a powder reagent and not a liquid.
Is it really that hard to open the packet and get all of the powder in the vial?
We do not have issue with the packets, As long as the packet is shaken to the the power into one corner, The flap is then cut and the packet folded to allow the power to fall down the crease in the packet we have not had issues ourselves.
Is this a hole kit that comes with the case too
Does the hanna checker come with the reagents, or do I need to order regents separate?
The Hanna Calcium Checker comes with enough reagent to do about 25 tests.
I would like to buy a Hanna checker for nitrate please but can not see one on
Your web site
They do not make a Nitrate checker. If/when they do though we will bring it in.