- 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 HI70436 Deionized 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.
Replacement Reagents - HI758-26 Calcium Checker Reagents
very inconsistent By Barnabie on 8/6/2020Barnabie wouldn't recommend this product to a friendI bought this checker because I love my ULR phosphorus checker and the Alkalinity checker.
This Calcium checker gives a different reading every time. I even went to the extent of placing the cuvette in the checker with the 10ml mark facing the front to make the testing repeatable and was still different readings every time. I clean all my testing equipment in RODI water. I tried using distilled water, RODI for testing and still no luck.
I did 3 different tests back to back with the Hanna
Test 1: 490
Test 2: 542
Test 3: 300
I immediately followed the 3 tests with Red Sea, and Salifert
Red Sea: 440
I guess I will keep it as a novelty item in my fish stuff seeing that I wouldn't give this checker to my worst enemy.
Not as bad as everyone says By Michael on 3/26/2019Michael would recommend this product to a friendI watched a video by Eat sleep reef where he explains the proper way to use this. I followed the video exactly and came out with reliable results. I double checked with my red sea test and then triple checked it with a salifert test. And for me + or - 4% is reasonable for a hobby grade test kit
Finally design that make sense. By omar on 1/31/2019omar would recommend this product to a friendOne of my biggest problems with hannah checkers is that they ask you to full in water to the line on the container. Problem is I have seen that up to 13ml of water can go in and still at the line. How can you expected accuracy when water level can vary 30%.
Glad they started adding a tool to measure the testing water volume.
I didnt listen to review By erick on 12/12/2018erick wouldn't recommend this product to a friendI didn't listen to the reviews - they're correct. This is WAY too finicky to be a reliable tester. I watched videos on how to do the tests EXACTLY and its only correct 1/3 of the time. When I use I have to double check with a Salifert test so why not just use a Salifert test? I wanted to return but they want return shipping plus 10% restocking fee. Another lesson here is that Amazon has a WAY better return policy!
Its ok By Brandon on 12/9/2018Brandon wouldn't recommend this product to a friendI have followed the instructions to the letter using zero TDS distilled water and consistently get inconsistent results. I have no confidence in this thing.
Terrible By Jesse on 8/31/2018Jesse wouldn't recommend this product to a friendThis product has terrible results when using RO/DI water. So now I have to buy a $10 bottle of specialty water and pay $25-30 for new reagents, plus the $50 I dropped on the test that doesn't work? Yea no good.
Wrong Everytime By Kyle on 8/23/2018Kyle wouldn't recommend this product to a friendFirst you have to use distilled water. Then when testing you can get different results. I would test 3-4 times, waist of time and money then I would get 3-4 different results. I just returned the item.
I trusted this tester and it slowly killed my stony corals! By Hermes on 7/20/2018Hermes wouldn't recommend this product to a friendI was getting crazy to see how every stony coral continued dying despite obtaining perfect parameters from my Hanna testers (Alkalinity, Phosphate and yes... Calcium).
Best practices, investment in additional equipment and supplements, nothing worked.
Last resource I sent a test to Triton Labs, and I was so upset when I got the results:
"Your Calcium levels are too low.
A lack of calcium can have very bad effects on the aquarium, please act quickly to restore."
All this time, my corals have been dying because I trusted in this Hanna tester, I've lost hundreds of dollars because of this piece of crap.
If you really want to use this, I strongly advise to have a primary Calcium testers and use this one, just for fun.
Easy to use By Dustin on 6/30/2018Dustin would recommend this product to a friendI find it easier to get a digital readout as opposed to what shade of blue is blue enough. I test and clean with distilled water and I've been spot on when tested against other test kits. You have to follow directions. Reagent, distilled water to the line, zero machine, tank water, powder, shake, test. Keep the tube clear of finger prints. It's that easy.
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
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.