• Help with the phosphate test (JBL).

  • Caitlin3279

I recently purchased a phosphate test (JBL), measured it, and the result is strange. After adding all the reagents according to the instructions and waiting, the water in the test tube remained clear, while the color scale indicates that 0 mg/l corresponds to a pale yellow shade. The next division, 0.25 mg/l, is a pale greenish tint, and so on up to dark blue. The question is: How much phosphate is in the water? 0, or is the test malfunctioning? I tried doubling the amount of reagents - a shade similar to 0.25 mg/l appeared, but the color intensity is still significantly less than even that pale hue on the scale.

Tanner

Did you sprinkle the red powder? You probably forgot...

Jacqueline5976

What's so strange about it? Zero is just zero...

Spencer7805

There is no red powder. 5 ml of water is added. Reagent 1 - white powder - one measuring spoon. Reagent 2 - liquid - 15 drops. Let it sit for 4 minutes. The color does not change.

Joseph1346

It is confusing that the yellowish shade corresponds to the scale, rather than white, especially since there are no yellowish reagents.

Jessica9188

Pour the powder and mix it well, then add and stir well, and then wait for 4 minutes. When we had 0, it was yellowish.

Joe

Yeah, I was hitting it... I'll try again... maybe I'll get lucky the third time.

Emily3506

Zero is barely yellow. Conduct a control test on distilled water or osmotic water, and you will see if there is a difference or not...

Rita

red powder in a small container was lost. look in the box. 3rd reagent

Christina9947

There is no red powder, and there are only 2 reagents. The red powder appears when there are visual glitches from the tests; tests should be done less frequently, less often.

Ronald

And I didn't have...

Jeremy3637

In the JBL phosphate test, there are only 2 reagents; there is no red one. Best regards.

Kevin

let's take a look

Stephen

sorry, I have a glitch. that's for calcium 3 container

Brent5588

You have the instructions. If it doesn't change color, it means there is a very low phosphate content. If it starts to turn slightly blue, then that's a problem.

Raven7170

Thank you all, I'll write when I try again. There is distillate, I didn't realize.

Amy9618

Today in the morning I measured the osmolytes - the same eggs... To check, I dripped a solution of flower fertilizer - it turned blue. So the test works, but it's difficult to interpret low values. Moreover, when there's a chance to "play with chemistry," there can be no talk of any sunlight, so I'm considering it under a desk halogen lamp. Maybe that's the reason... Although there are no problems with other tests.

Adam4310

Well then! So in your aquarium, the phosphate level is minimal...

Jeffery

This is pleasing.

Jason9385

To avoid opening a new topic! Can you enlighten me on how to properly perform a nitrate test (JBL)? Previously, I used Tetra (which has a rough scale). Today, I bought the JBL test. The test shows "0", while Tetra shows something in between "0" and "12". Maybe I'm doing it wrong: I take 10 ml of water from the aquarium, add 2 large scoops of powder, shake for 3 minutes, then add 6 drops of reagent, shake for a couple more minutes... then I check the result...

Stacey4437

Rinse the test tubes with the sample water. Fill both with 10 ml each. Add 2 large scoops of reagent 1. Then add 6 drops of reagent 2, close the tubes, and shake vigorously for exactly 1 minute. The powder does not dissolve completely; for better color comparison, tilt the test tube slightly so that the powder collects on one side. To allow the color to fully develop, wait 10 minutes and then compare the colors. Best regards.

Jeffery

Thank you! So, that's what I did. Nitrate "0" - cool...

Carrie1606

In this post, EvgenyL provided a link to an article that describes the testing of various nitrate tests: In the control solution containing 4 mg/L of nitrate, JBL showed 1 mg/L, while Tetra showed 10-12 mg/L.