Because a single scale cannot be both broad and precise at the same time. The 3.0 to 10.0 scale locates an unknown water across 14 colour fields, while the 7.4 to 9.0 scale covers hard water and koi ponds with the resolution needed to spot a developing shift.

Closed JBL ProAquaTest Lab Koi case, front panel listing the parameters KH, GH, NH4, NO2, NO3, pH, PO4 and O2

Reading a JBL PROAQUATEST result in the laboratory comparator block.

JBL PROAQUATEST CO2 conversion table, to be cross-referenced between pH and KH

10-in-1 water analysis kit for ponds

Name: 10-in-1 water analysis kit for ponds
Brand: JBL
Price: 14400.0 RSD
Availability: InStock

14,400.00 RSD

4,800.00 RSD × 3 with no fees Klarna.

This kit brings together ten drop tests and 22 reagent bottles to monitor the water in a pond or an aquaponic system: pH, KH, GH, ammonium, nitrite, nitrate, phosphate and dissolved oxygen.

pH and phosphate are each read across two ranges, and the comparator block accounts for the natural colour of the water.

Water test

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The summary

What you receive: the waterproof case, 22 reagent bottles, glassware, syringes, a thermometer, and the colour comparator block.
What you measure: 10 drop tests, from pH across two ranges to phosphates across two ranges, through to dissolved oxygen.
How long it takes: 2 minutes for total hardness, 17 minutes for ammonium, including waiting time.
How to choose: this kit is the right choice as soon as a pond heats up in summer or is home to koi.
What gets used up: the 22 bottles, at very different rates depending on the test.
What gets sent to you: the closed case, bottles in their original slots.

Ten drop tests for the pond, from ammonium to dissolved oxygen

The JBL PROAQUATEST 10-in-1 water analysis case is used to monitor the water of a garden or koi pond, as well as an aquaponic system, with 10 drop tests and 22 reagent bottles. It measures pH, KH, GH, ammonium, nitrite, nitrate, phosphate and dissolved oxygen, from 1 to 10 mg/L.

A garden pond changes more quickly than an indoor tank, because sunlight, rain, and leaves enter it without any filter. This kit brings together ten drop tests and 22 reagent bottles, from ammonium to dissolved oxygen, so that each season can be read from recorded figures rather than the appearance of the water.

🔬 Ten tests in one kit

The ten tests fall into three families: nitrogen, with ammonium, nitrite and nitrate; the mineral foundation, with two pH ranges and the two hardnesses; and the measurements specific to the pond, phosphate in two formulations and dissolved oxygen. The ammonium test uses 3 reagents and, through a chart that cross-references pH and temperature, gives the proportion of ammonia that is actually toxic. All the bottles have a child-resistant cap and can be bought again one by one, in a plastic case that withstands water and can be carried closed to the pond's edge.

The nitrogen trio

Ammonium, nitrite and nitrate show where biological filtration stands. These are the three key readings for a pond that is starting up or has just been restocked.

The mineral base

pH, carbonate hardness, and total hardness are read together. KH stabilises pH, and pH determines the toxic proportion of ammonia.

Two phosphate ranges

One formulation reads low concentrations, from 0.05 to 1.8 mg/L. The other takes over in koi water that is already heavily loaded.

Dissolved oxygen

You measure it from 1 to 10 mg/L on a sample taken without any bubbles. At 2 mg/L and below, the colour chart enters its red zone.

The oxygen test tube is filled by immersion

The oxygen test is the only one in the kit where the sample is not measured out with a syringe. Submerge the test tube to fill it to the brim, add 6 drops of reagent 1 and 6 of reagent 2 while letting it overflow, then screw on the cap without trapping a single bubble, otherwise you are measuring the air as much as the water. Shake for 30 seconds, add 6 drops of reagent 3, shake again for 30 seconds and wait 10 minutes before reading. All three reagents are corrosive: work over a sink and rinse thoroughly in case of splashes.

🌊 Oxygen in summer

Oxygen is the parameter in this kit where a shortfall can cause fish losses within hours. Warm water holds less of it than cool water, and a reading of 3 mg/L calls for action the same day. Aim for 5 to 8 mg/L in fresh water, and repeat the measurement at the same time of day, otherwise two readings cannot be compared. The article on pond algae in summer explains why oxygen runs lowest at the end of the night, and when to measure it.

Re-seed the filter when nitrite remains detectable

Nitrite that remains readable for several days in a row, often after a period of low oxygen, indicates that the biological filtration is no longer converting the whole nitrogen load of the pond. The concentrated pond bacteria restart the colonisation of the filter media, and the kit shows you, measurement after measurement, whether the colonisation is taking hold, up to the reading where nitrite is no longer detectable.

🐟 Two pH ranges

The wide range runs from 3.0 to 10.0 and is read across 14 colour fields, in steps of 0.5 above pH 4.0, which is enough to place an unknown water but not to follow a slow change. The second range covers 7.4 to 9.0, that of hard waters and koi ponds, and it is the one that gives the fineness that is useful day to day. This fineness matters because pH determines the share of ammoniacal nitrogen present as ammonia, the only form that is truly toxic: the conversion is read from a chart that crosses pH with temperature, and the thermometer in the kit is there for exactly that. The guide to keeping koi carp gives the ammonia, nitrite and oxygen thresholds to maintain for this fish.

Temperature matters as much as pH in this calculation. At pH 8, the proportion of ammonia represents about 1.8% of the ammoniacal nitrogen in water at 10 °C, and about 5.4% at 25 °C: the same ammonium content therefore becomes 3 times more toxic between a spring morning and an August afternoon. Record the temperature at the very moment of sampling, not the previous day's, before reading the table, and redo the calculation each season rather than keeping last year's figure.

🥬 Nitrate feeds your crops

In a planted pond, nitrate stops being a waste product. Marginal plants and the lettuces in a deep water culture bed take it up, and this kit lets you track the gap between what the fish produce and what the roots consume. Measure it at least 24 hours after topping up with water, otherwise you are reading the dilution and not the production. The colour chart runs from 0.5 to 200 mg/L, enough to cover a heavily stocked pond as well as a planted pond at rest.

Two other values largely determine the colour of the water in spring. Phosphate is measured here in two formulations, one for low concentrations and the other for koi water that is already heavily loaded, because a single scale does not cover both cases. Measure it together with nitrate before you change anything in your pond, since it is the scarcer of the two nutrients that limits algae growth. The five approaches to green pond water start from these two readings.

🗂️ Tracking all 22 bottles

The 22 bottles do not run out at the same rate. The nitrite, ammonium and pH reagents are used up quickly on a young pond, whereas those for total hardness and high-concentration phosphate last for whole seasons. So keep an eye on the level of these three tests, because they are the ones you will run short of first, and replace them with refills sold separately. The case, test tubes, syringes, measuring spoons, thermometer, comparator block and colour charts stay with you from one year to the next.

Technical specifications

The essentials

Tests included: 10 drop testspH and phosphate each count for two, with a low range and a high range
Parameters measured: pH, KH, GH, NH4, NO2, NO3, PO4, O2Eight separate parameters, two of which are read on two different scales
Reagent bottles: 22, child-resistant capsFrom 1 bottle for carbonate hardness to 3 for ammonium and for oxygen.
Method: Liquid reagents, colorimetric readingThe comparator block accounts for the natural colour of the water, including leaves and peat
Covered water: Garden pond and koi pondThe two phosphate ranges distinguish clear water from water that is already loaded.
Manufacturer's reference: JBL 2407200, PROAQUATEST rangeCode EAN 4014162240729

The ten tests, one by one

pH, wide range: 3.0 to 10.014 colour fields, in steps of 0.5 above pH 4.0, to place an unknown water
pH, alkaline range: 7.4 to 9.0For hard water and koi ponds, precise enough to track a slow change over time
KH, carbonate hardness: Titration, 1 drop = 1 °dKHAt least 5 °dKH in a pond to keep the pH stable
GH, total hardness: Titration, 1 drop = 1 °dGHOn 5 ml of water. The colour change goes from red to green
NH4 and NH3, ammonium: Colorimetric, using 3 reagentsThe truly toxic proportion of ammonia is read from a table cross-referencing pH and temperature
NO2, nitrites: 0.025 to 1 mg/LThe target is zero, and that is the reference value during a start-up
NO3, nitrates: 0.5 to 200 mg/LTake readings at least 24 hours after a top-up, otherwise you are measuring the dilution.
PO4, Sensitive version: 0.05 to 1.8 mg/LThe lower range, where the balance between plants and algae is decided
PO4, koi version: High concentrationsIt takes over on water that the lower range saturates
O2, dissolved oxygen: 1 to 10 mg/LAim for 5 to 8 mg/L in freshwater. The colour chart turns red at 2 mg/L and below.

The technique and the timing

Water volume per test: 5 or 10 mlExcept for oxygen, whose test tube is filled by submersion, without any bubbles
Waiting time: 0 to 15 minutesNone for KH and GH, 5 minutes for nitrite, 10 for nitrate and oxygen, 15 for ammonium
Titration tests: KH and GHCount the drops until the colour change, with no colour chart to compare against
Reading: Colour chart, in daylightA warm artificial light shifts the perception of pink and orange shades

To budget for separately

Iron: An iron Fe testYellowing foliage between veins that remain green stands out against this figure.
Reagent refills: Reagents sold individuallyGlassware, syringes, thermometer, comparison block, and colour charts keep well

14 further specifications are available in the detailed view.

In the box

1 water-resistant plastic case
22 reagent bottles with child-safety caps
Glass test tubes
Plastic test tubes
Water sampling syringes
Dosing measures
1 thermometer
1 laboratory comparator block
1 set of colour charts
1 ballpoint pen
1 set of analysis record sheets
1 instruction leaflet

Tests, case contents, reference and EAN code taken from the official JBL PROAQUATEST LAB Koi data sheet on 20/09/2026. Ranges, protocols and waiting times taken test by test from the instructions for the same tests sold individually.

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.

Ten tests, six tests or five boxes?

All three use the same drop reagents and the same colour comparator block. What sets them apart is the range of parameters they cover and how you restock what runs out.

Dissolved oxygen is tracked as a numerical reading This kit adds oxygen, nitrate, a fine pH range and a second phosphate scale. Answer two questions and the chart will identify the version that suits you.

	Drop tests (tests)	pH, KH, ammonium and nitrite	NO3, nitrates	GH, total hardness	PO4, phosphates	O2, dissolved oxygen	pH, narrow range of 7.4 to 9.0	PO4 at high concentration, koi version	Single kit with comparison block	Thermometer included	Each parameter in its own box	Price
6-in-1 pond water analysis kitYour choice	6 tests	Yes	No	Yes	Yes	No	No	Yes	Yes	No	No	6,400.00 RSD
Recommended 10-in-1 test kitYour choice	10 tests	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No	14,400.00 RSD
Pack of 5 aquaponics water tests: NH4, NO2, NO3, pH, KHYour choice	5 tests	Yes	Yes	No	No	No	No	No	No	No	Yes	7,700.00 RSD

6-in-1 pond water analysis kit

What you're measuring

Drop tests (tests)6 tests

pH, KH, ammonium and nitriteYes

NO3, nitratesNo

GH, total hardnessYes

PO4, phosphatesYes

O2, dissolved oxygenNo

pH, narrow range of 7.4 to 9.0No

PO4 at high concentration, koi versionYes

The form and restocking

Single kit with comparison blockYes

Thermometer includedNo

Each parameter in its own boxNo

Price

10-in-1 test kitRecommended

What you're measuring

Drop tests (tests)10 tests

pH, KH, ammonium and nitriteYes

NO3, nitratesYes

GH, total hardnessYes

PO4, phosphatesYes

O2, dissolved oxygenYes

pH, narrow range of 7.4 to 9.0Yes

PO4 at high concentration, koi versionYes

The form and restocking

Single kit with comparison blockYes

Thermometer includedYes

Each parameter in its own boxNo

Price

Pack of 5 aquaponics water tests: NH4, NO2, NO3, pH, KH

What you're measuring

Drop tests (tests)5 tests

pH, KH, ammonium and nitriteYes

NO3, nitratesYes

GH, total hardnessNo

PO4, phosphatesNo

O2, dissolved oxygenNo

pH, narrow range of 7.4 to 9.0No

PO4 at high concentration, koi versionNo

The form and restocking

Single kit with comparison blockNo

Thermometer includedNo

Each parameter in its own boxYes

Price

Parameters, contents and references of the three test kits sourced from the official JBL PROAQUATEST datasheets on 20/09/2026, then cross-checked test by test against the instructions for the same tests sold individually.

Estimate your
delivery time

2.11 kg parcel, shipped within 48 hours by Colissimo or Chronopost to your home, as you choose during payment. The exact cost is shown in the 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

10 questions

6 key questions, 10 in the detailed view

How many tests does the kit contain, and for which parameters?

This kit or the six-test case?

Three differences settle it, and they are best read in this order.

Dissolved oxygen is found only in this kit, and it is the key measurement for a pond that is warming up.
Nitrate is in the same position: it is the nitrogen ration for your crops.
The pH range of 7.4 to 9.0 and the Sensitive phosphate test, which reads low levels, are found only in this kit.

The 6-in-1 pond test case, for its part, offers pH over a wide range, both hardness values, ammonium, nitrite and phosphate in the koi version.

One kit or five separate boxes?

It depends on how often you take measurements. A case brings together the glassware, the comparator block and the colour charts once and for all, and it can be carried closed to the pond side.

Separate boxes, such as those in the pack of 5 aquaponics tests, are bought again one at a time when a bottle runs out. This is the right format if you always take out the same two or three tests.

Why two pH ranges?

Why two phosphate tests?

When should dissolved oxygen be measured?

Do reagents expire, and are ten tests too many for a home user?

The expiry date is printed on every pack, and it no longer applies once the bottle has been opened, because the air that gets in shortens the life of the reagent. Each pack carries its batch number and date.

It is therefore the rotation of the tests that should decide your purchase, more than how many you buy. In a garden pond, ammonium, nitrite and pH are tested all season, whereas total hardness and high-concentration phosphate come out a few times a year and keep very well.

A reagent whose colour has changed, or which no longer gives the same result on two samples of the same water, should be replaced.

How is the sample taken for oxygen testing?

Rinse the glass test tube with pond water.
Fill it to the brim by submerging it in the water, then stand it on a watertight support.
Slowly add 6 drops of reagent 1, then 6 of reagent 2, letting it overflow.
Screw on the cap without trapping any air bubbles and shake for 30 seconds.
Add 6 drops of reagent 3, close the tube, shake for 30 seconds and wait 10 minutes.
Read the tube lying on its side, 3 to 5 cm from the colour chart.

Is iron being measured?

Where should you work, and what do you do with the leftover solution in the test tube?

H314severe burns, KH and oxygen

H225highly flammable, ammonium 3

Set up over a sink, in a ventilated room, away from any flame. The caps are child-resistant and the case closes again, but several reagents are corrosive or flammable, and the nitrate reagent also carries a skin sensitisation warning.

Pour the treated test tubes down the sink, never into the pond, since some reagents are toxic to aquatic organisms. Rinse thoroughly in case of splashes and keep the original label, as a doctor will ask for it.

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10-in-1 water analysis kit for ponds

The summary