Packaging of the NH4 ammonium test refill, showing the three numbered reagent bottles

Table comparing the contents of the refill with those of the full test kit: the accessories are not included with the refill

Chart of charge autonomy: approximately 50 measurements, compared with 42 for a six-week cycling and 56 for eight weeks

Hazard statement diagram bottle by bottle: H314 and H318 on the first two, H225 on the third

Reagent refill for NH4 ammonium test

Name: Reagent refill for NH4 ammonium test
Brand: JBL
Price: 11.0 USD
Availability: InStock

$11.00

Ammonia is the first waste product in an inhabited water system, and the fastest indicator that biological filtration is struggling. These three bottles are the reagents for the ammonia test, in the same volume as those in the original kit.

Approximately 50 tests — enough to monitor a full cycle start-up at one test per day. Your existing glassware, comparator block, and colour chart remain in use.

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Payment in instalments, free of charge

The summary

What it measures: ammonium, the primary waste product of an inhabited tank.
What the box contains: 3 numbered reagent bottles (1, 2 and 3) and an illustrated instruction leaflet.
How many tests: approximately 50, as supplied in the original kit.
How often: one test per day during cycling, then only after an incident.
Refill or complete kit: it all depends on the condition of your colour chart and glassware.
Shipping: a parcel weighing 0.08 kg, available for collection point or home delivery.

Three bottles of reagents to continue monitoring ammonium, approximately 50 tests

Ammonium is the first waste product in any inhabited water. It appears as soon as fish waste, leftover food or a dead plant begins to decompose, and bacteria then convert it into nitrite and then into nitrate. In a well-established system, this process takes a few hours and the test reads zero. A measurable value therefore always means the same thing: the biological filtration can no longer keep up.

Measure it every day during the initial fill of a new grow bed, then after every incident. In aquaponics, monitoring has a second purpose, since your plants live off the nitrates produced at the end of this chain: as long as ammonia remains detectable, those nitrates are not yet present. Our guide to the nitrogen cycle covers these three weeks in detail.

🔁 What the refill replaces

These three bottles contain the same volume of reagent as those in the original kit, giving approximately 50 tests. Simply slot them into your existing kit and carry on using the glassware, syringe, colour comparator block, and colour chart you already have. Consumption tends to come in bursts: a six-week cycling run at one test per day requires 42 tests, an eight-week run requires 56. One set of bottles will last a single cycling run, not two.

What to keep from the kit

Keep the glassware, the comparator block and the colour chart from your ammonium test, as these are what convert the colour into milligrams per litre. Replace the complete kit if the colour chart is stained or faded, or if a test tube is broken. During cycling, the nitrite refill runs out at the same rate, which makes it worth anticipating with a single order rather than two separate ones.

Three bottles, all three classified

This refill carries nine hazard statements, and all three bottles are classified. The propan-2-ol reagent carries H225, highly flammable liquid. The one containing sodium hydroxide and sodium hypochlorite carries H314 and H318, severe skin burns and eye damage, plus EUH031. Store the box up high and away from any flame, and empty the treated test tube down the sink with plenty of running water.

📦 In the pack

The box contains three reagent bottles with child-safety caps, numbered 1, 2 and 3, along with an illustrated instruction leaflet in French. No accessories are included, which is precisely the point of a refill kit. Screw the caps on fully and store the box dry, in its original packaging, away from direct light: a reagent stored this way retains its properties until the date printed on the bottle, whereas a bottle left open on a warm shelf will give low readings after a few months.

🧮 When to order it

The right time to reorder is not when the bottle is empty, but when you know consumption is about to increase. Starting up a tank, bringing a pond back into service in spring, or receiving a new batch of fish all signal a run of daily measurements. Order a refill before these periods rather than in the middle of them, as any gap in monitoring falls at precisely the moment when values can shift from one day to the next. In routine use, on a stable system measured once a week, one set of bottles covers almost a full year.

Technical specifications

What the refill contains

Contents: 3 reagent bottlesReagents NH4 1, NH4 2 and NH4 3, numbered on the label, plus the illustrated instruction leaflet
Measurements: Around 50Same reagent volume as in the original kit. The number of tests varies with how regularly you dose
Manufacturer reference: JBL 2412200, PROAQUATEST rangeEAN code 4014162241221. Not to be confused with 2412100, which is the complete kit
Corresponding test: Ammonium NH4 test, ref. 2412100The refill is used with the glassware, the comparator block and the colour chart from this test.

Usage frequency

Recommended frequency: 1 measurement per day at start-upOn a new freshwater tank, plus one reading after any illness or fatality
Runtime per cycling: 1 cycling, not 242 readings for six weeks, 56 for eight weeks, compared against a capacity of around 50
Media covered: Freshwater, pond, saltwaterThe chemistry is the same as in the kit. The colour chart carries the three reading bands.
Parcel weight: 0.08 kgPackaging included

Safety

Hazard classification: Hazardous, 3 classified bottlesH225, H314, H315, H318, H319, H336, H400, H411 and EUH031. Advice P101, P102, P303+P361+P353, P305+P351+P338, P501a
Declared components: Propan-2-ol, caustic soda, hypochloriteCAS numbers 67-63-0, 1310-73-2 and 7681-52-9

To budget for separately

Glassware and syringe: Those from the ammonium testThe two test tubes screw onto this specific test: they cannot be swapped with just any tube.
Comparator block and colour chart: Those from the ammonium testThe colour chart is printed: it's what converts the colour into milligrams per litre.

4 further specifications are available in the detailed view.

In the box

3 reagent bottles with child-safety caps, numbered 1, 2 and 3.
1 illustrated multilingual instruction leaflet, French included

Reference, EAN code, contents, recommended testing frequency, and hazard statements taken from the official data sheet and the manufacturer's instructions, on 5 and 7 September 2026. The count of approximately 50 tests relates to the complete kit; the refill carries the same reagent volume, cross-checked against a reseller product listing on 7 September 2026. The number of tests per cycling is an approximate figure, calculated on the basis of the recommended frequency and a cycling period of six to eight weeks.

Restock the reagents, or replace the test kit?

The refill and the kit share the same chemistry, the same protocol and the same number of tests. The only difference lies in the accessories , and therefore in what you already own.

The refill only replaces what has been used up It includes three bottles, fifty measurements and an instruction leaflet. The colour chart, test tubes and sampling syringe, however, must already be in your possession and remain reusable.

	Reagent bottles (bottles)	Possible measurements (measurements)	Illustrated instructions	Glass test tubes with screw caps	Sampling syringe	Comparison block	Colour reference chart	Price
Recommended Reagent refill for NH4 ammonium testYour choice	3 bottles	50 measurements	Yes	No	No	No	No	$11.00
Ammonium NH4 water test in dropsYour choice	3 bottles	50 measurements	Yes	Yes	Yes	Yes	Yes	$18.00

Reagent refill for NH4 ammonium testRecommended

What gets used up

Reagent bottles (bottles)3 bottles

Possible measurements (measurements)50 measurements

Illustrated instructionsYes

What does not get consumed

Glass test tubes with screw capsNo

Sampling syringeNo

Comparison blockNo

Colour reference chartNo

Budget

Ammonium NH4 water test in drops

What gets used up

Reagent bottles (bottles)3 bottles

Possible measurements (measurements)50 measurements

Illustrated instructionsYes

What does not get consumed

Glass test tubes with screw capsYes

Sampling syringeYes

Comparison blockYes

Colour reference chartYes

Budget

Contents of both columns recorded from the official supplier data sheet and its instruction leaflet on 07/09/2026.

Documents & manuals

Official manufacturer's instructions, in French

Six-step procedure, order of the three reagents and number of drops. This is the instructions for the full test: they apply equally to the refill, which contains the same reagents.

PDF · 2,7 Mo

Download

Estimate your
delivery time

Parcel weighing 0.08 kg, dispatched to a collection point or via Colissimo to your home address, your choice at checkout. Bottles are sent in their original packaging. The exact amount is shown in the basket.

Frequently asked questions

6 questions

6 key questions

How many tests does a refill hold?

A refill pack contains around 50 tests — the same number as the new kit, since the volume of reagent is identical. At the recommended start-up rate of one test per day, that gives a simple reference point:

42tests for a 6-week cycling period

56tests for an 8-week cycling period

One bottle therefore covers a start-up cycle, with a small margin in hand if cycling is short — but it will run out before the end of a longer one.

Refill or complete kit — how do you decide?

There's one single deciding factor, and it has nothing to do with your setup — it depends on the condition of your equipment:

Your situation	What you need
Colour chart, glassware and block all intact	The refill
Colour chart lost or illegible	The complete test
Test tube broken, scratched or frosted	The complete test
Kit stored somewhere warm for years	The complete test, and check the other tests in the kit
You've never had this test	The complete test, without hesitation

Is the colour chart included with the refill?

No. The refill contains only the reagent bottles and the instructions. The colour chart used for reading results is the one from your original kit, and without it no result can be interpreted: the colours produced on their own are meaningless.

It is the piece most often sought by buyers, because it is printed on card and tends to leave with the packaging when the kit is put away in a drawer. If it has gone missing, the only solution is to buy the complete test again.

In what order are the three bottles used?

Add the drops from bottle 1 to the test tube containing the sample — never into the blank.
Add the drops from bottle 2 immediately after, into the same test tube.
Add the drops from bottle 3 last. Its drops are noticeably smaller than those from the first two: this is normal — do not add extra to compensate.
Replace the cap, shake, then allow the colour to develop before reading the result.

The numbers are printed on each label. Adding them in the wrong order produces a false colour, not an approximate one.

Can I start with the refill if I have never used this test before?

How should you store and dispose of these bottles?

Store the box closed, up high, and away from any naked flame: one of the three reagents is a highly flammable liquid.

The caps are child-resistant. An empty or out-of-date bottle should be taken to a household chemical collection point, never placed in ordinary waste, and the used test tube should be emptied down the sink rather than into the drain — two of the warnings on the reagent label relate to toxicity for aquatic organisms.

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Reagent refill for NH4 ammonium test

The summary