$64.40
FREE Returns
FREE delivery Wednesday, April 24. Order within 16 hrs 48 mins
In Stock
$$64.40 () Includes selected options. Includes initial monthly payment and selected options. Details
Price
Subtotal
$$64.40
Subtotal
Initial payment breakdown
Shipping cost, delivery date, and order total (including tax) shown at checkout.
Ships from
Amazon
Ships from
Amazon
Returns
Eligible for Return, Refund or Replacement within 30 days of receipt
Eligible for Return, Refund or Replacement within 30 days of receipt
This item can be returned in its original condition for a full refund or replacement within 30 days of receipt.
Read full return policy
Returns
Eligible for Return, Refund or Replacement within 30 days of receipt
This item can be returned in its original condition for a full refund or replacement within 30 days of receipt.
Read full return policy
Payment
Secure transaction
Your transaction is secure
We work hard to protect your security and privacy. Our payment security system encrypts your information during transmission. We don’t share your credit card details with third-party sellers, and we don’t sell your information to others. Learn more
Payment
Secure transaction
We work hard to protect your security and privacy. Our payment security system encrypts your information during transmission. We don’t share your credit card details with third-party sellers, and we don’t sell your information to others. Learn more
Support
Product support included
What's Product Support?
In the event your product doesn't work as expected or you need help using it, Amazon offers free product support options such as live phone/chat with an Amazon associate, manufacturer contact information, step-by-step troubleshooting guides, and help videos. By solving product issues, we help the planet by extending the life of products. Availability of support options differ by product and country. Learn more
Support
Product support included
In the event your product doesn't work as expected or you need help using it, Amazon offers free product support options such as live phone/chat with an Amazon associate, manufacturer contact information, step-by-step troubleshooting guides, and help videos. By solving product issues, we help the planet by extending the life of products. Availability of support options differ by product and country. Learn more
New (7) from
$64.40  & FREE Shipping.
Other Sellers on Amazon
Added
$64.40
& FREE Shipping. Details
Sold by: WCNI
Sold by: WCNI
(29 ratings)
100% positive over last 12 months
Only 1 left in stock - order soon.
Shipping rates and Return policy
Added
$64.95
& FREE Shipping. Details
Sold by: ProMerchandizer
Sold by: ProMerchandizer
(101 ratings)
93% positive over last 12 months
Only 15 left in stock - order soon.
Shipping rates and Return policy
Added
$64.95
& FREE Shipping. Details
Sold by: E-Pawz & Friends
Sold by: E-Pawz & Friends
(406 ratings)
100% positive over last 12 months
Only 4 left in stock - order soon.
Shipping rates and Return policy

Hanna Instruments HI758 Marine Calcium Checker Test Kit - Saltwater Aquariums

4.6 out of 5 stars 720
Amazon's Choice highlights highly rated, well-priced products available to ship immediately.
Amazon's Choice in Aquarium Test Kits by Hanna Instruments
$64.40 with 8 percent savings
Typical price: $69.95

This is determined using the 90-day median price paid by customers for the product on Amazon. We exclude prices paid by customers for the product during a limited time deal.
Learn more
FREE Returns
{"desktop_buybox_group_1":[{"displayPrice":"$64.40","priceAmount":64.40,"currencySymbol":"$","integerValue":"64","decimalSeparator":".","fractionalValue":"40","symbolPosition":"left","hasSpace":false,"showFractionalPartIfEmpty":true,"offerListingId":"emEN%2B3lXEbLfTAYbIWUMiF4vCdPY3SqcMo3Dzej%2ByJ2jXIz7UqTWhF6Xj74R1F1oKiUFqDyAVHgZHxrx8T%2BbLI%2BFBak7Lp8osQnkz8f62tqam8vAoOKXy8b52iT9oXQV0Sl6t5pZOP%2B%2By1a4id7dOEV1NRxFwI1e%2FX6sqqHblarL%2BeQ3qL6OpiU0QfO8W8Gc","locale":"en-US","buyingOptionType":"NEW","aapiBuyingOptionIndex":0}]}

Purchase options and add-ons

Brand Hanna Instruments
Target Species Fish
Material Dolomite
Special Feature Lightweight
Item Weight 1 Pounds
Style Modern

About this item

  • Easier to use and more accurate than chemical test kits, less expensive than professional testing
  • Accuracy +/-6 % of reading at 25 degree C / 77 degree F
  • Large LCD screen for readability
  • Auto shut-off to extend battery life
  • Operated by a single AAA battery

Consider a similar item

(473)
$11.99
Climate Pledge Friendly Climate Pledge Friendly

Frequently bought together

Hanna Instruments HI758 Marine Calcium Checker Test Kit - Saltwater Aquariums
$64.40
Get it as soon as Wednesday, Apr 24
In Stock
Sold by Garden and Pets Corp and ships from Amazon Fulfillment.
+
Hanna Marine Magnesium Checker® HC HI783
$63.50 ($63.50/Count)
Get it as soon as Wednesday, Apr 24
Only 1 left in stock - order soon.
Sold by WCNI and ships from Amazon Fulfillment.
Total price:
To see our price, add these items to your cart.
Details
Added to Cart
One of these items ships sooner than the other.
Show details Hide details
Choose items to buy together.

Product details

  • Is Discontinued By Manufacturer ‏ : ‎ No
  • Product Dimensions ‏ : ‎ 3 x 4 x 2 inches; 1 Pounds
  • Item model number ‏ : ‎ HI 758
  • Batteries ‏ : ‎ 1 AAA batteries required.
  • Date First Available ‏ : ‎ August 8, 2011
  • Manufacturer ‏ : ‎ Hanna Instruments
  • ASIN ‏ : ‎ B005FH2OIY
  • Customer Reviews:
    4.6 out of 5 stars 720

Product Description

Calcium presence in water supplies results from passage over deposits of limestone, dolomite, gypsum and gypsiferous shale. Its concentration may extend from 0 to several hundred milligrams per liter, depending on its source and treatment. Calcium is necessary in plant and animal nutrition since it is an essential constituent of bones, shells and plant structures. Calcium in water as carbonate is one of the primary components of water hardness which can cause pipe or tube scaling. The HI 758 Calcium Checker HC is extremely simple to use. First, zero the instrument by adding Reagent A, deionized water and 0.1 mL of sample into the vial. Insert into the HI 758 and press the button. Next, remove the vial and add Reagent B and shake to dissolve. Reinsert into the Checker HC and press the button to read the calcium concentration in ppm on the display. Use for quick and accurate on the spot analysis. Single button operation: zero and measure. Range: 200 to 600 ppm. Resolution: 1 ppm. Accuracy at 25 degree C: +/-6% of reading. Light Source: light emitting diode at 610 nm. Light Detector: Silicon Photocell. Environment: 0 to 50 degree C (32 to 122 degree F); max 95% RH non-condensing. Battery Type: (1) 1.5V AAA. Auto-off: after 10 minutes of non-use. Dimensions: 81.5mm x 61mm x 37.5mm (3.2" x 2.4" x 1.5"). Method: adaptation of the zincon method.

Product guides and documents

User Manual (PDF)

Looking for specific info?

Customer reviews

4.6 out of 5 stars
4.6 out of 5
720 global ratings

Customers say

Customers like the quality of the vivarium. For example, they mention the results are excellent, it works well, and is a great product. That said, opinions are mixed on accuracy and ease of use.

AI-generated from the text of customer reviews

20 customers mention20 positive0 negative

Customers are satisfied with the quality of the vivarium. They mention that the results from this unit were excellent, and it worked well. Some say that it's an extremely helpful test device and simple to use.

"...The results from this unit were excellent, I used my own RO/Di water and got results that were very close to what a fresh batch of Instant Ocean..." Read more

"...For me this is an extremely helpful test device in my arsenal for keeping a eye on my tank. I also have the Hanna Phosphate and Alkalinity checker...." Read more

"Works great very accurate follow directions very simple to use, no more counting drops is gonna be nice...." Read more

"...Easy to use and fast. It come with battery, and enough testing for 25 tests. I wished I’d bought this in the beginning." Read more

32 customers mention20 positive12 negative

Customers are mixed about the accuracy of the vivarium. Some mention that it's extremely accurate when the tests are performed, while others say that it is far from accurate, inconsistent, and difficult to use.

"...If you do this and use them properly you get consistent accurate results and the real beauty is that you don't have to look at anymore color charts..." Read more

"I trust the other Hannah testers, but this one is far from accurate...." Read more

"...For the long term, I will definitely be using this since it has similar accuracy, but is MUCH easier to use and cheaper overall." Read more

"...I tested 4 more times over the next 2 days and the readings are spot on. If you don't have one... buy it now, you won't regret it" Read more

30 customers mention20 positive10 negative

Customers are mixed about the ease of use of the vivarium. Some mention that the instructions are easy to understand, and the test is easy to perform. However, others say that the steps to test are a bit tricky, and there are too many steps.

"...you don't have to look at anymore color charts and the test are so much easier to perform than the old school stuff...." Read more

"...definitely be using this since it has similar accuracy, but is MUCH easier to use and cheaper overall." Read more

"...The powder reagent is kind of a pain to add and you have to be careful adding it. Also the price of replacement reagents is not cheap...." Read more

"after using one or two times its very simple to use ...." Read more

Great product
5 Stars
Great product
Works great very accurate follow directions very simple to use, no more counting drops is gonna be nice. Comes with a nice plastic case and everything u need to run the tests.
Hide
Thank you for your feedback
Sorry, there was an error
Sorry we couldn't load the review

Top reviews from the United States

Robbyg
5.0 out of 5 stars Excellent accurate results.
Reviewed in the United States on February 20, 2016
Verified Purchase
I have Been keeping Reef Tanks for 31 Years and these Hanna Test kits are the Best ones I have ever used. I moved from the Red Sea pro models that I had to Hanna and I will never go back unless Hanna does not have a kit for what I need. I have used Red Sea, Salifert, API and ELOS and while I have to admire the Bang for the buck with API kits, the accuracy is just not good enough for serious tanks but is certainly good enough for FOWLR tanks.

The Calcium Test Kit unlike other kits in their lineup does require a few more steps, but then again so do all Calcium test kits I have ever used.
At least their is NO little measuring cup to measure out a Gram of Powder LOL. The results from this unit were excellent, I used my own RO/Di water and got results that were very close to what a fresh batch of Instant Ocean mix claimed. I love the digital readout and the way these kits work, I cannot see myself using color wheels again unless Hanna does not have a kit for that test.

With the Hanna kits there are a few tricks to getting accurate results, I will be doing a you tube video on that for people to see, needless to say if you dip them in a Tank to fill the vials, after you get the level right and seal the vial, make sure to rinse the outside off and your hands with fresh water and then dry it with a paper cloth and give it a final polish with a reading glasses cleaning cloth. If you do this and use them properly you get consistent accurate results and the real beauty is that you don't have to look at anymore color charts and the test are so much easier to perform than the old school stuff. I can do 4 different tests in under 10 minutes and have good results that are repeatable.

Update: 15 Feb 2020
My Tester finally died. It seems like the button no longer works. It just stays on C1 saying to press button.
Due to the way these things are sealed I see no way of repairing it without destroying the case. I guess it's not all that bad since I got 4 YEARS of service out of it. I am ordering a new one today,
29 people found this helpful
Helpful
 Report
Anthony
5.0 out of 5 stars Very helpful little device when Dosing
Reviewed in the United States on September 18, 2014
Verified Purchase
Works as stated. I've run this against the API calcium test and it comes in exactly in range. Hard to match exactly as the API has a 20PPM max resolution. I like using the Hanna as it does show exactly (within limits of accuracy for the device) what the Calcium levels are in the tank. Since I am using a Balling LIte dosing method on the tank I like to know what the calcium levels are every few days and this has come in very handy for me. I can run the test in approximately 5 minutes and have an accurate measurement of Calcium.

I'm not sure why some people are having accuracy issues. I do use RO/DI water (Guess mine is lab grade). I do keep up with DI and Silica resin changes and my TDS read zero. I've run the test twice in a row just to see if there was a gross difference in the readings and each time it read within 5 ppm. I chalk that up to the small difference in sample/reagent added via the pipette. I think the hardest part is adding the powered reagent. I've found that cutting the top and using a small scissors to crease open the packet allows for easier addition of the reagent to the solution. As it creates a V for the reagent to slide down into the vial. Make sure your getting all your reagent added. And be consistent with all addition of sample and liquid reagent.

For me this is an extremely helpful test device in my arsenal for keeping a eye on my tank. I also have the Hanna Phosphate and Alkalinity checker. I would recommend the Alkalinity checker as well. The phosphates are typically low in my tank so the Phosphate Checker really never gets used.

The negatives are that the API Calcium test is cheaper to run per test I believe. The powder reagent is kind of a pain to add and you have to be careful adding it. Also the price of replacement reagents is not cheap. A quick (by memory) pricing for the Hanna is it costs $0.76 per test (not counting cost of checker). Could I live without the Hanna Calcium checker? Sure, as the API test works. But, I would miss it. I'd give it 4.5 Stars. Since I can't rate 1/2 stars I rounded up. If the Calcium checker used all liquid reagents I would give is 5 stars.
4 people found this helpful
Helpful
 Report
Djr1565
5.0 out of 5 stars Accurate and easy to use
Reviewed in the United States on October 9, 2014
Verified Purchase
We have an aquaculture business and depend on quality test equipment and found this item to be our top choice for calcium testing, we also use the Hanna Alkalinity tester as well.

If you read and follow the instructions, then you will love this tester.
I read a review about having to get water from Hanna or some other (lab grade di water)
I have a RO/DI system installed and use nuclear grade DI resin, and thats all you need if you have your own RO/DI system.
BRS is where we get our DI resin

If you don't have a system to produce your own DI water, I would be careful where you get water. A lot of places do not change the Resin like they should.

I used to use the Salifert test and still do for other test, but I will be switching over to all the Hanna testers as I run out of the old test kits.
What I really like about these testers is, you get a number, not a color to compare or how much regent is left from drops etc,.
2 people found this helpful
Helpful
 Report

Top reviews from other countries

Translate all reviews to English
Brad k
5.0 out of 5 stars Great product
Reviewed in Canada on April 1, 2023
Verified Purchase
Would love to rate it.. 5 star for Hanna instruments but zero star for not receiving it. Amazon reimbursement authorized.
Report
André S.
5.0 out of 5 stars Sehr gut
Reviewed in Germany on February 12, 2022
Verified Purchase
Erstes Gerät hatte leider einen Fehler in der Anzeige. Nach kurzem Kontakt mit dem Herstellersupport hatte ich nach zwei Tagen ein neues Gerät. Diese tut was es soll und es lässt sich der Calziumwert genau und einfach messen.
Report
jim mcferran
5.0 out of 5 stars Five Stars
Reviewed in the United Kingdom on February 18, 2015
Verified Purchase
Easy to read. Straight forward and simple. No need to guess if colours match as with other testing methods
One person found this helpful
 Report
Gisele M.
5.0 out of 5 stars Very accurate and easy
Reviewed in Canada on March 22, 2023
Verified Purchase
Easy to use, and very accurate. Very happy
Report
Bitter Petra
5.0 out of 5 stars Klasse
Reviewed in Germany on February 19, 2022
Verified Purchase
Super Produkt
Würde es wieder kaufen
One person found this helpful
 Report