- 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
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Hanna Instruments HI758 Marine Calcium Checker Test Kit - Saltwater Aquariums
|Price:||$50.38 & FREE Shipping. Details|
Specifications for this item
|Brand Name||Hanna Instruments|
|Item Weight||1 pounds|
|Number of Items||1|
|Part Number||HI 758|
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Top Customer Reviews
A few days ago, I received from Hanna a box with a new set of reagents and a small bottle of their deionized water. I promptly performed a test and then double checked it with my Red Sea test kit. The results were the same. I then, just to make sure, performed three additonal tests. They all were consistent. So, I thank Hanna for replacing and reforming the reagents. The kit in and of itself is very, very easy. The main thing was the reagents, so hopefully, things will continue to hold up well..
The bottom line is, after getting results that were off by more than 100 ppm, how could I ever trust this kit again? I couldn't. I returned it. And, I'm not the only one. Countless others are having the same problem with this product.
Let me finish by saying that I like what Hanna does. I think their alkalinity checker is superb and I use it exclusively. I really wanted a way to test calcium easily and accurately, but I suppose I'll have to keep waiting.
Most Recent Customer Reviews
Should I knock one star off because it's not quite as good as the hanna alkalinity or phosphorous checkers (I'm coming from a marine tank owner, this thing has other uses where... Read morePublished 1 month ago by Amazon Customer
This seems to be much more accurate then other style of test kits. Certainly worth the money and I am very happy with my purchase, I have ought several other hanna checkers.Published 4 months ago by Rob
Easy to use, comes with plenty of reagents. Very trustworthy. I use this to test for calcium in my mixed reef aquarium. Read morePublished 4 months ago by William Cameron White
I have Been keeping Reef Tanks for 31 Years and these Hanna Test kits are the Best ones I have ever used. Read morePublished 5 months ago by Robbyg
Its a process, you have 5 steps before you get the reading plus you have to us RO water with every sample.Published 6 months ago by jenn
Followed instructions that came with product and even looked a Hanna YouTube video and still got WILD ranging results. I'll stick to API or Salifert.Published 6 months ago by Randall F.