Blister pack for the JBL PROAQUATEST CO2 Direct refill, two titration reagent bottles

The three bottles of JBL ProAquaTest CO2 Direct reagents supplied in the refill, on a white background

Reagent refill for dissolved CO2 test

Name: Reagent refill for dissolved CO2 test
Brand: JBL
SKU: J2414100
Price: 33.0 AED
Availability: InStock

Dhs. 33.00

These two bottles are the reagents for the dissolved CO2 test. They are used to measure the free carbon dioxide in your water, not the carbonates measured by carbonate hardness.

The reading is taken by titration: each drop of the second reagent equals 2 mg/L, and the final pink colour must hold for 60 seconds. The test tube and the two-field colour chart from your kit remain in use.

Ref. J2414100·Reagent refill

Customer support 7 days a week by email

Delivery within 2 to 15 business days

100 % secure payment

The summary

What it measures: free carbon dioxide, not the carbonates of hardness.
What's in the box: 2 titration reagent bottles.
How to read the result: you count the drops, each worth 2 mg/L.
What you're aiming for: 15 to 30 mg/L, and 20 to 25 mg/L for plant growth.
The original kit: the dissolved CO2 drop test, whose 20 ml tube and two-field colour chart you keep.
A highly flammable bottle: store it away from any flame; neither reagent ever goes into the fish water.

The two titration reagents on their own, one drop equals 2 mg/L of CO2

The 2 titration bottles in this refill extend the drop-based dissolved CO2 test: each drop of reagent 2 equals 2 mg/L in 20 ml of fresh water. The target range is 15 to 30 mg/L. Whether flammable or corrosive, neither reagent ever goes into the fish's water.

Dissolved carbon dioxide is the free CO2 in your water, which plants use for photosynthesis. It is not the same as the carbonates you measure through carbonate hardness. These two bottles are the titration reagents only for the direct CO2 test, for freshwater.

🫧 One drop equals 2 mg/L

Fill the test tube with 20 ml of water, letting it run slowly down the side of the tube so that no bubbles form, then stand it on the white square of the colour chart. Add 5 drops of reagent 1, then reagent 2 drop by drop, shaking after each drop, until a pink tint stays stable for 60 seconds and matches the pink square. The number of drops multiplied by 2 gives the level in mg/L, so 10 drops correspond to 20 mg/L of CO2.

The blank value

Aerate 100 ml of the same water for 15 minutes, measure it, then subtract that result from your reading.

The pink that lasts

A pink that fades back to colourless within 60 seconds means the titration is not finished.

An air pump for the blank value

The blank value requires aerating 100 ml of water for 15 minutes with an air pump and a diffuser. An aquarium air pump with one or two outlets is enough for this sample, and it also serves to aerate your tank if the CO2 level exceeds the recommended range. Without this correction, other acids present in the water add a few milligrams to each measurement.

A highly flammable reagent in the box

Reagent 1 carries the H225 statement, which indicates a highly flammable liquid and vapour, and reagent 2 causes severe skin burns and eye damage. Store the box dry, at room temperature, away from any flame, heater or lighting rail, and rinse at length with water in the event of a splash in the eye.

🍃 The plants' balance point

In your tank, a level of 15 to 30 mg/L is harmless to fish while ensuring good plant growth, with the range aimed at for plants being 20 to 25 mg/L, and some heavily planted tanks going up to 35 mg/L. This test is used first and foremost to adjust a CO2 injection system, such as a pressurised CO2 kit. It does not check a so-called liquid carbon fertiliser, which contains no CO2. The pH depends on both this level and the carbonate hardness, and the guide to regulating pH explains this link.

🧪 Two titration bottles

With a titration, the number of tests per bottle depends on your water: water rich in gas requires more drops of reagent 2, and the blank value doubles each check. The reagent 2 bottle therefore empties faster than the first, and its level tells you when to reorder. Hold the bottles upright, nozzle down and dry on the outside, then store them capped in their original packaging.

The 20 ml test tube and the two-box colour chart remain those from your CO2 drop test. Reagent 1, which is highly flammable, should be kept away from any flame, and the titrated tube is emptied down the sink: these reagents must never go into the fish water.

Technical specifications

What the refill contains

Contents: 2 reagent bottlesTwo titration bottles, closed with a child-resistant cap
Manufacturer's reference: JBL 2414100, PROAQUATEST rangeNot to be confused with 2414000, which is the complete kit
Matching test: Dissolved CO2 testRef. 2414000, direct measurement by titration
Tests per bottle: Depending on the CO2 contentWater rich in gas needs more drops of reagent 2

Counting the drops

No reading: 1 drop = 2 mg/L10 drops of reagent 2 therefore correspond to 20 mg/L of CO2
Water volume: 20 ml, no bubblesAdded slowly against the wall of the tube. A bubble carries off gas and lowers the result
Target values: 15 to 30 mg/LFrom 20 to 25 mg/L for plants, up to 35 in a heavily planted tank
Shaded surroundings: Freshwater only

Hazard labelling

Signal word: DangerThe 2 bottles are sorted
Pictograms: Flame, exclamation mark, corrosion
Hazard statements: H225, H319, H314H225 and H319 on reagent 1, H314 on reagent 2
Precautionary statements: P101, P102, P303+P361+P353, P305+P351+P338, P501
Precautions: Sink, ventilated room, out of reachEthanol declared in reagent 1
Storage: Keep dry, away from flamesBottles upright, capped, in their original packaging

To allow for in addition

Test tube and colour chart: Those from the CO2 testThe test tube takes 20 ml, and the colour chart has two squares, one white and one pink
Air pump and diffuser: For the blank reading100 ml of the same water, aerated for 15 minutes before the control measurement

8 further specifications are available in the detailed view.

In the box

2 bottles of titration reagents, with child-resistant caps

Manufacturer's values (CO2 Direct test instructions and safety data sheets). The reference points of 15 to 30 mg/L and the blank value come from the instructions. With a titration, the number of tests per bottle depends on the value measured.

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.

The two bottles alone, or the complete test?

The CO2 titration uses the same reagents in both boxes. The test adds the graduated tube and the two-square colour chart.

Pink is best judged against a white background The titration stops when the pink holds for 60 seconds, read against the colour chart box: the refill assumes this equipment.

	Titration bottles (bottles)	Test tube graduated up to 20 ml	Two-square colour chart, white and pink	Price
Recommended Reagent refill for dissolved CO2 testYour choice	2 bottles	No	No	Dhs. 33.00
Dissolved CO2 water test in drops, direct measurementYour choice	2 bottles	Yes	Yes	Dhs. 58.00

Reagent refill for dissolved CO2 testRecommended

What runs out

Titration bottles (bottles)2 bottles

What keeps

Test tube graduated up to 20 mlNo

Two-square colour chart, white and pinkNo

Budget

Dissolved CO2 water test in drops, direct measurement

What runs out

Titration bottles (bottles)2 bottles

What keeps

Test tube graduated up to 20 mlYes

Two-square colour chart, white and pinkYes

Budget

Contents of the two boxes according to the CO2 Direct test instructions.

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

Does this test measure carbonate hardness?

Why draw the 20 ml without any bubbles?

What is the blank value for on aerated water?

Take 100 ml of your water in an open container.
Aerate it for 15 minutes with an air pump and a diffuser, long enough for it to lose its free carbon dioxide.
Run a normal test on this aerated water.
Subtract this result from the reading taken on the tank water.

This control measures what the protocol counts over and above the genuinely dissolved gas. Without it, you will consistently read a few milligrams too high.

Why must the pink hold for 60 seconds?

Does this test check a liquid carbon fertiliser?

A highly flammable reagent, where should I store the box?

Reagent 1 carries the statement H225, highly flammable liquid and vapour, as well as H319. This is what determines how it should be stored.

Keep the box up high, in a dry place at room temperature and away from any flame or heat source, so not on the lid of a lighting unit, nor near a heater.

Reagent 2 carries the statement H314, severe burns and eye damage: rinse the eye thoroughly if splashed. An empty bottle should be taken to a recycling centre with household chemical products.

The contents of the test tube can be poured down the sink, as these reagents must never go into the fish water.

Let us talk about your project

A question about this product or your setup? Our team will answer and advise you.

Email us Contact form

Interest-free instalment payments

Offered depending on the cart amount, at checkout.

Delivery in 2 to 15 working days

Depending on the products and shipping sites. Estimate by destination in the estimator on this page.

After-sales service 7 days a week by email or chat

Our team answers all your questions.

Shop responsibly

Become part of the change.

Reagent refill for dissolved CO2 test

The summary