Blister pack of the JBL PROAQUATEST NO3 refill, one powdered reagent and one liquid reagent

Pot of powder and bottle of JBL ProAquaTest nitrate NO3 reagent supplied in the refill, on a white background

Reagent refill for nitrate NO3 test

Name: Reagent refill for nitrate NO3 test
Brand: JBL
SKU: J2412600
Price: 11.99 USD
Availability: InStock

$11.99

These two bottles, one powder and one drops, are the reagents for the nitrate test kit, providing approximately 40 measurements. Readings cover a range of 0.5 to 200 mg/L.

In aquaponics, this parameter plays two roles: it's a waste product to keep in check, and the form of nitrogen your plants feed on. The glassware, sampling syringe, measuring spoon, comparator block and colour chart from your kit remain in use.

Ref. J2412600·Reagent refill

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The summary

Gloves and sink: both reagents are corrosive and toxic to aquatic life, so never put them in the fish water.
What's in the box: 2 bottles, one powder reagent and one in drops.
How many tests: about 40, the same count as the original kit.
What you're aiming for: no more than 30 mg/L in fresh water, 5 mg/L in a pond.
How often: once a week, and as soon as green algae appear.
Two bottles or the test: the refill is enough if you have kept the kit's double measuring scoop and colour chart.

The two reagents for the nitrate test, approximately 40 measurements, from 0.5 to 200 mg/L

This refill for the NO3 nitrate test combines a powder reagent and a drop reagent, for about 40 measurements from 0.5 to 200 mg/L, using the double measuring spoon, the test tubes and the colour chart from the kit. In freshwater, stay below 30 mg/L. Both reagents are classed as Danger and never go into the fish water.

Nitrate is the final form in the nitrogen cycle, the one the bacteria produce from nitrite and that your plants absorb. These two bottles, a powder reagent and a drop reagent, are the refill reagents alone for the nitrate drop test, for around 40 tests in freshwater, seawater and pond water.

🧂 Powder, drops and ten millilitres

Fill two 10 ml test tubes, then add to one of them one large measure of powder, taken with the wide end of the double measuring spoon, and 6 drops of the second reagent. Close the test tube and shake it vigorously, then leave it to stand for 10 minutes until the colour has fully developed. The reading is then taken in the comparator block, with the untreated test tube compensating for the natural tint of your water.

Shake hard, then leave the grey residue

Shake the closed test tube until only a few traces of grey powder remain at the bottom. These traces are normal and do not interfere with the reading, whereas shaking too gently leaves a paler colour and an underestimated value. Keep exactly 10 ml in each test tube, as the reagent dose is calibrated for this volume.

Both reagents are classified Danger, with the statements H314 and H317, and the second also carries the statement H341, which indicates suspected genetic defects. The statements H411 and H412 relate to toxicity to aquatic organisms. Wear gloves, empty the treated test tube down the sink and never into your tank, and take an empty bottle to the recycling centre with household chemical products.

🥬 A nutrient for your crops

A nitrate level that rises steadily while ammonium and nitrite remain undetectable shows a biological filter that is working and a nitrogen production higher than what the plants consume. The guideline is not to exceed 30 mg/L in freshwater, 20 mg/L in seawater and 5 mg/L in a garden pond. In aquaponics, you are not aiming for zero, since this nitrate is the fertiliser for your crops, and the guide to the nitrogen cycle places this stage among the others.

Combine the phosphate refill to fight algae

Add the phosphate test refill to the same order if green algae appear. A high nitrate level only encourages their growth if the water also contains phosphate, and the two values are read on the same day to guide the correction. If you do not yet have this kit, the complete phosphate test supplies the glassware and the colour chart.

📅 Testing frequency and replacement

On a newly set-up tank, freshwater or marine, one measurement a week is enough, with an extra measurement as soon as green algae start to develop. At this rate, the 40 measurements cover about 9 months of monitoring. Store the bottles tightly closed, in a dry place, at room temperature and in their original packaging. If your water goes beyond the last field of the colour chart, dilute 5 ml of sample in 5 ml of distilled water and multiply the result by 2.

Unopened, the two reagents keep for 2 years, and both the powder and the drops deteriorate faster once opened. The double measuring scoop, the test tubes, the block and the colour chart are the same as those of your nitrate drop test. The tested water, with its grey residues, goes down the sink: these reagents must never go into the fish water.

Technical specifications

What the refill contains

Contents: 2 reagent bottlesOne powder reagent and one drop reagent, numbered on the label
Readings: Around 40Same reagent volume as in the kit
Manufacturer's reference: JBL 2412600, PROAQUATEST rangeNot to be confused with 2412500, which is the complete kit
Matching test: Nitrate test NO3, ref. 2412500The refill is used with the glassware, syringe, measuring spoon, comparator block and colour chart of this test

Reading the nitrate

Measuring range: 0.5 to 200 mg/LNine-field colour chart, read in the notch of the comparator block
Recommended levels: No more than 30 mg/L in freshwater5 mg/L in a garden pond and 20 mg/L in a marine aquarium

Hazard labelling

Signal word: DangerThe 2 reagents are ranked
Pictograms: Corrosion, exclamation mark, health hazard, environment
Hazard statements: H314, H317, H341, H411, H412H314 and H317 on both, H411 on reagent 1, H341 and H412 on reagent 2
Precautionary statements: P101, P102, P303+P361+P353, P305+P351+P338, P501
Precautions: Gloves, sink, out of reachZinc, acids and phenylenediamine declared
Storage: 2 years, unopened bottlesBottles tightly capped, in their original packaging. A reagent whose colour has changed should be replaced

To allow for in addition

Glassware, syringe and measuring scoop: The ones from the nitrate testYou need two test tubes side by side, and the double measuring scoop that doses the powder
Comparator block and colour chart: Those of the nitrate testThe block slides along the nine fields until the two tints meet

6 further specifications are available in the detailed view.

In the box

2 reagent bottles, one powder, the other drops

Manufacturer's values (NO3 test instructions, safety data sheets and FAQ). The measuring range and the nine fields match the test's colour chart.

Manufacturer and product safety

Manufacturer: JBL GmbH & Co. KG
Postal address: Dieselstraße 3, 67141 Neuhofen, Allemagne
Contact: info@jbl.de
Website: www.jbl.de

Information provided under Regulation (EU) 2023/988 on general product safety.

Two reagents, or the nitrate kit?

The same powder, the same drops and the same number of tests are found on both sides. It is the dosing and reading equipment that makes the difference.

A poorly measured powder shows in the result This test depends on three items that are not sold separately: the measuring scoop that doses, the two test tubes that are compared and the colour chart that translates.

	Reagent bottles (bottles)	Possible tests (tests)	Glass test tubes with screw caps	Graduated sampling syringe	Double measuring scoop for the powder	Grey comparator block	Nine-field colour chart	Price
Recommended Reagent refill for nitrate NO3 testYour choice	2 bottles	40 tests	No	No	No	No	No	$11.99
Nitrate NO3 water test, drop formatYour choice	2 bottles	40 tests	Yes	Yes	Yes	Yes	Yes	$22.73

Reagent refill for nitrate NO3 testRecommended

What runs out

Reagent bottles (bottles)2 bottles

Possible tests (tests)40 tests

What keeps

Glass test tubes with screw capsNo

Graduated sampling syringeNo

Double measuring scoop for the powderNo

Grey comparator blockNo

Nine-field colour chartNo

Budget

Nitrate NO3 water test, drop format

What runs out

Reagent bottles (bottles)2 bottles

Possible tests (tests)40 tests

What keeps

Glass test tubes with screw capsYes

Graduated sampling syringeYes

Double measuring scoop for the powderYes

Grey comparator blockYes

Nine-field colour chartYes

Budget

Contents of the two boxes, taken from the instructions and the data sheet for the nitrate test.

Estimate your
delivery time

A 0.08 kg parcel, dispatched within 48 hours by Colissimo or Chronopost home delivery, as you choose at checkout. The two bottles are sent in their original packaging. The exact shipping cost is shown in your basket. Once unsealed, this product cannot be returned under the right of withdrawal (article L221-28, 5° of the French Consumer Code), for reasons of hygiene and health protection.

Frequently asked questions

6 questions

6 key questions

Should you aim for zero nitrate in aquaponics?

No, and that is the difference from an ordinary aquarium. Nitrate is the nitrogen your plants consume, so water at zero mostly means there is no nitrate nitrogen left for your crops.

The useful guide is a range, not a minimum: enough to feed the plants without exceeding 30 mg/L in a freshwater tank. A value that rises week after week indicates that production exceeds consumption, and that is the time to add growing area or feed a little less.

Why take 10 ml and not 5?

Do I need to dissolve all the powder?

Nitrate or phosphate, which one explains my algae?

How often should you test?

What does the H341 statement on this reagent mean?

H341 indicates a suspected risk of genetic defects. It is specific to this test.

It does not change how the test is used, but it does change the care you take: wear gloves, avoid skin contact, keep children away, empty the test tube down the sink and never into the fish water, and take the empty bottle to a recycling centre with your household chemicals. The H411 and H412 statements, for their part, concern toxicity to aquatic organisms.

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Reagent refill for nitrate NO3 test

The summary