API Calcium Test Kit, 150 Gram

Cost is high

J'utilisai le test TETRA qui est une vrai galère avec 2 produits et une poudre et surtout qui ne donne pas les bons résultats...J'avais remarqué ce test utilisé dans une animalerie mais non commercialisé par cette dernière...Enfin le produit simple et fiable que j'attendais! je vous le recommande vivement

This is my go to test kit for calcium. It is easy to use and the color change is readily discernable. I cant comment on accuracy of the test, but I am able to generate consistent numbers. The reason that I rate this at 4 rather than 5 is because each test requires 10 drops of reagent 1. However, for each test if you have typical levels of calcium in your reef, one would use 20 drops (roughly) of reagent 2. This means that you will consume all of reagent 2 and only about half of reagent 1. All API would need to do is increase the volume of reagent bottle 2 (and charge a little more) to get more tests from the kit.

My only complaint is instructions are hard to understand.

People debate the accuracy of this all the time when compared to the higher end test kits. For me, it simply works. The resolution of the testing is to 10 ppm and other products go .5 ppm. I'm personally okay with knowing I'm either 420 PPM or 410 PPM weekly. The point is to graph and understand the trend line over time. If you're trying to track specific daily fluctuation you're better off going with a higher end kid. For me it works and is simple to use for my application.Tip: 10 drops of Bottle #1 and shake. When you start bottle #2 you'll start seeing a trend based on your tank consumption. For my tank, I'm consistently at 400+ PPM. So for Bottle #2, I put in 19 drops at the same time and shake. Then add additional drops until I see the color change. Don't add a drop and shake starting at the beginning or you'll be there all day.

AP test kits work. I've used them for years and had no problems with getting consistent results. You do have to completely follow the instructions, and you need to read the results in daylight, not the LED or flourescent light over your tank.