Hanna Instruments

Hanna Instruments Checker Marine Calcium Colorimeter

HN1187

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The Hanna Marine HI758U Calcium Checker® bridges the gap between simple chemical test kits and professional instrumentation, giving you accurate results for your saltwater aquarium in the palm of your hand.

Many test kits on the market today rely the human eye to judge and determine color changes, which are notoriously difficult to use, especially in the lower ranges. Many professional instruments offer great accuracy using technology, but are not affordable to the average aquarist. The Hanna Marine Calcium Checker® HI758U bridges the gap between simple chemical test kits and professional instrumentation, using a fixed wavelength LED and silicon photo detector to provide the accuracy of professional instrumentation at the affordable price of a chemical test kit.

The Benefit of Testing for Calcium

Calcium is an essential ingredient to a healthy and functional reef aquarium. Corals and coraline algae require calcium for calcification and growth, so much so that an aquarium stocked with these organisms require regular calcium supplements in order to maintain healthy levels.

A variety of commercially available supplements exist, from calcium salts to buffered calcium supplements, which raise both calcium and alkalinity. Many aquarists set up a regular supplementation schedule to maintain proper calcium levels. However, regular calcium monitoring is crucial to a healthy reef aquarium, even if such a system is in place. This is because as corals and coraline algae grow and mature, their requirements for calcium tend to increase. As a result, the growth of the aquarium might outpace the calcium supplementation regimen.

The ideal range for calcium in a healthy reef aquarium is between 380-450ppm. Values below 380ppm may slow the growth of corals, whereas high levels of calcium (>500ppm) puts the tank at risk for calcium carbonate precipitation (limestone formation).


Features:

  • The Checker HI758U easily fits into the palm of your hand or pocket
  • Ideal for Aquaculture and Aquarium testing
  • Easier to use and more accurate than chemical test kits
  • Large, easy to read digits
  • Auto shut off
  • Single battery operation
  • Use for quick and accurate on the spot analysis
  • Single button operation: zero and measure


Specifications:

Range200 to 600 ppm
Resolution1 ppm
Accuracy @ 25°C/77°F±6% of reading
Light SourceLED @ 610 nm
Light Detectorsilicon photocell
Methodadaptation of the Zincon method
Environment0 to 50°C (32 to 122°F); RH max 95% non-condensing
Battery Type  (1) 1.5V AAA
Auto-offafter ten minutes of non-use
Dimensions81.5mm x 61mm x 37.5mm (3.2" x 2.4" x 1.5”)
Weight64 g (2.25 oz.)
Ordering Information

HI758 Calcium Checker is supplied with:

  • (2) sample cuvettes with caps
  • Calcium reagent starter kit for 25 tests*
  • Dropper
  • 1 ml syringe with tip
  • 100 microliter pipette with tip
  • Plastic pipette
  • Battery
  • Instructions and quick start guide.
Warranty1 year limited warranty

*Uses Hanna Instruments Calcium Reagent HI758U-26


How it works:

  • Press the button to power the meter on. Notice “Add C1” appears on the screen - you are now ready to begin testing.
  • Using the 1mL syringe, add 1mL of reagent A to the cuvette. Then, using the dropper, fill the cuvette to the 10mL mark with deionized water. Distilled water is also acceptable. Once the reagent and water are added, invert the cuvette five times to mix.
  • Using a microfiber cloth, wipe the cuvette to remove any oils or fingerprints from the glass. Then, place the cuvette into the checker and close the lid, making sure it is completely closed. It is important to make sure that the lid is completely closed for an accurate reading.
  • Press the button. Once the screen shows "Add C2", remove the cuvette from the meter.
  • Add 0.1mL of sample. For best accuracy, use the supplied 0.1mL pipette. Note: To use the Hanna Instruments Micropipette, first attach the pipette tip. Push the button to the first "stop", and then immerse the tip into the sample. Slowly release the button to its original position. Then, wait two seconds to catch any drops before dispensing the sample into the cuvette to the second "stop".
  • Once the sample is added, add one packet of reagent B to the sample. After that, cap the cuvette and shake vigorously for 15 seconds. Wait 15 seconds for bubbles to dissipate.
  • Wipe the cuvette of any oils and fingerprints, and place back into the meter. Press the button; The meter will directly display the concentration of calcium in ppm.


Calcium Checker Troubleshooting Tips

  1. Never rinse your cuvettes with tap water or saltwater
  2. Use pure vapor distilled water from your local pharmacy at C1 phase. RODI water from home filtration units may not be suitable for this test as calcium can easily permeate through your filter membranes.
  3. Clean your cuvettes with distilled or deionized water absent of Calcium that is going to be used for C1 phase dilution. 
  4. Measure out 9 ml of distilled or deionized water for C1 phase
  5. Make sure no excess aquarium sample saltwater is on the tip of the pipette. Only administer the saltwater that is sucked into the pipette tip. 


Product Manuals & Documentation

Hanna Instruments Checker Marine Calcium Colorimeter

Owner's Manual available for download in Adobe PDF file format

Manufacturer Info

Hanna Instruments USA Aquarium Supplies
Hanna Instruments is a leading manufacturer of analytical aquarium instrumentation. They were founded in 1978 and are headquartered in Woonsocket, Rhode Island. When Hanna introduced pH Electronic Paper in 1986 it literally revolutionized the world of testing by allowing millions of people in various industries to test for pH in a simple, accurate and affordable way. Hanna employees are constantly challenging themselves to improve on existing technology and to invent new testing techniques with the common goal to simplify analytical testing. This applies not only to instrumentation, but also to sensors development, reagents and chemicals. Hanna also believes in controlling the quality of their products from inception to delivery so they manufacture everything themselves, from meters and electrodes to chemical reagents and buffer solutions.

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9 Questions
Displaying questions 1-9
 
Q
do any test regents come with this, or do you have to buy them seperate
Asked : Nov 29, 2020
By : fred, usa
 
 
 
A
This unit will include a starter kit of reagents.
Answered : Dec 01, 2020
By : MD TECH
 
Q
Is this an important item for stoney corals
Asked : Jul 05, 2020
By : Rich, Oklahoma
 
 
 
A
Absolutely, if you want your corals to grow then you have to be able to maintain certain levels of calcium in your aquarium there for you will have to measure it
Answered : Aug 01, 2020
By : Alfred , Laredo
 
 
Sort by:
 

Overall, others give this:

  • 4.5

45 Reviewers (91%) would recommend this

Overall Rating:

download image
5  Star
 31
4  Star
 10
3  Star
 2
2  Star
 1
1  Star
 1
 
5
5.0
Fast, easy and accurate

reviewerbadge
PROS
Fast, accurate and easy to use
CONS
Reagents are expensive
REVIEW
Now that it includes the sample pipette this checker is very reliable. No more trying to guess the titration color.
  • 1
Was this review helpful: Yes(0)No(0)
 
 
 
5
5.0
Great

reviewerbadge
PROS
Works great
CONS
None so far
REVIEW
I really love this meter and it is very cool and very easy to use and very accurate
I would recommend this meter to anyone who is a serious hobbyist
Remember to use RO/DI water
  • 1
Was this review helpful: Yes(0)No(0)
 
 
 
5
5.0
Awesome

reviewerbadge
PROS
Fast results easy to use
CONS
None
REVIEW
Super easy to use and fast
  • 1
Was this review helpful: Yes(0)No(0)
 
 
 
5
5.0
Easiest way to check for calcium levels

reviewerbadge
PROS
Easy and fast way to measure calcium
CONS
Price is more expensive than others
REVIEW
This is by far the easiest and fastest way to check on calcium in your aquarium love all Hanna products by far the best and most reliable test you can get
  • 1
Was this review helpful: Yes(0)No(0)
 
 
 
5
5.0
I hate testing water

reviewerbadge
PROS
No more guessing. Easy to use
CONS
None
REVIEW
I really do hate testing water because of all of the guess work of trying to match colors, This tester removes all the guessing. Love it
  • 1
Was this review helpful: Yes(0)No(0)
 
 
 
1
1.0
Didn't work right out of the box!

reviewerbadge
REVIEW
unit is giving low lightt indicator error. hanna can't explain. On it way back to MD. Never again Hanna!
  • 0
Was this review helpful: Yes(0)No(0)
 
 
 
5
5.0
buy it

reviewerbadge
REVIEW
so much nicer than adding one drop, recapping, shaking over and over until the solution changes color. i will buy every hanna checker that test for a substance that i need to test for.
  • 1
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Write Your Review Earn 15 Points when you write a review
Sort by:
 

Overall, others give this:

  • 4.5

45 Reviewers (91%) would recommend this

Overall Rating:

download image
5  Star
 31
4  Star
 10
3  Star
 2
2  Star
 1
1  Star
 1
 

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