It is not accurate. It always showed the same results. Even when they fed my fish a lot of food and they died.

For a quick and multiple test, it's just fine. However, it's not as reliable as the individual and specialized ones. It's also difficult to separate the results.

They don't have the perfect accuracy like all others of their kind, but they give a picture if something is not going well.

The instructions that come with the box are not helpful enough, but luckily there are some better ones on their website.
>> The instructions that helped me are here: https://www.eshalabs.eu/europe/products/esha-aqua-quick-test.html. If you read them carefully, you will see exactly what the results mean, but I will mention some important points:
>> The results for chlorine come out in 1 second, while for the rest you have to wait 60 seconds for them to stabilize.
>> Another thing that helps the first few times is to take a photo and do the tests there. Because it took me over a minute to figure out what is what and the results had been altered.
>> Also, to find the value of GH-General Hardness, you will need to check the 3 boxes underneath. If I'm not mistaken, a good result for GH is: 1 or 1 and a half purple box.
>> If you have any exotic fish, the ideal values may vary.

It is reliable enough for quick testing of nitrates (NO3) and nitrites (NO2), I have checked it with liquid tests as well. However, it falls short in other measurements. For anyone who wants a simple test, it is fine. For more demanding measurements, liquid tests are the way to go.

Useful for quick measurement of certain parameters such as chlorine and nitrates-nitrites. However, it is not as reliable in measurement as doing it with solutions, for example, I have seen a difference in pH measurement. Also, it is not 250 tests, it is 50 sticks with 5 parameters each. This is a bit misleading and loses one star.

Because there was a shortage of the product, after a phone call and my consent, they sent me the AQUAVITAL, which, however, does not indicate whether the measurement you took is correct or not. You have to rely on your experience. Anyway, for me, the test is fine.