• JBL tests are misleading!!!

  • Katie5500

I measured the pH in my aquarium. I decided to double-check. In the morning, my wife took 50 ml of water from the marine aquarium to work. After 30 minutes on the road, I immediately measured it with serious equipment. She called me right away and said the pH was 8.6... I did a couple of tests with JBL, and the result was the same – 8.2. Now, when testing with JBL, I will add 0.4 to the result obtained. I'm not saying all their tests are like this – but a result is a result. And in general, I need to switch to an electronic pH meter...

Cynthia

What surprises you? The test error is 20% (any tests, from any manufacturer), the instrument error is 1-0.1% (depending on the class). Tests do not lie, they do not lie. They show within their accuracy limits.

Jacqueline6670

and to the extent of this accuracy they must indicate!!!!

Katherine

In my opinion, the approximate accuracy of any device is at least double the minimum division price, i.e., if the step of the device is 0.2, then it is 0.4. This is very rough, but realistic. As for various drops and stripes, that's a separate conversation—tracking their delivery history (and intermediate storage conditions) is simply impossible. Many tests just need to be warmed up, left in the sun, and that's it. Similarly, an uncalibrated super-duper pH meter can have an error of one unit.

Heather

YES, and calibrate every month... Otherwise, it shows such drama!

Emily3506

Great result. As for electronic pH meters, it's not that simple here either.

Emma

Pay attention to the time of the indicator color change (as stated in the instructions). This is relevant for JBL.

Brandy1134

Where is the excellent result?

Lynn4242

Your reagents from JBL.

Joseph6461

That is, if the tetra shows zero in the distillate, and I test seawater and it shows 12... then the JABIEL always shows zero both in the distillate and in the sea... I was already scared, thought the test wasn't working... I tried it on freshwater, everything is fine...

Megan

Continuing about the tests, does anyone know if the NO3 test can stop working over time? The test is about a year old, I measured it - everything was fine, it showed results, but now I've been measuring nitrates in the aquarium for a week and it shows zero. Well, I have strong water changes every day, I stopped for 4 days and haven't changed the water, feeding generously - measured - 0, measured in the paludarium where there's peat in the substrate and water changes are very rare - 0??? Has the test gone bad??? Sorry if this is off-topic.

Catherine6534

Maybe, of course... these are ready-made reagents...

Courtney4094

Hello! As far as I know, measuring a parameter like pH should be done on-site, meaning you take a sample in a measuring cup, add the reagent, and compare the result within five minutes. Alternatively, you can place the measuring electrode in the aquarium and check the result. Measuring after such a long transportation, especially with such a small volume, is pointless; it's no longer the same water that was in the aquarium. A pH of 8.2 is very good; everyone should strive for that in the sea. However, it is generally better to use a calibrated pH meter, as it is much more accurate and clearer. There are now also very affordable pH monitors available.

Jessica5348

If everything were that simple, then hydrobiological surveys wouldn't be such a tedious and burdensome task. Everything that can be measured is done on-site, or is fixed on-site with the appropriate reagents.