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JBL K Potassium Test
Quick test to determine the potassium content in freshwater aquariums

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Product information sheet Instructions
There are successor products for this item:
PROAQUATEST K Potassium
  • For the perfect aquarium plant growth: determines the ideal potassium value to monitor the fertilisation of freshwater aquariums
  • Quick test: fill cuvette with sample water, add reagents, fill cloudy sample water into special glass vial until underlying cross is no longer visible, read the quantity you have filled. This value is equivalent to the potassium content in mg/l
  • Use: for the ideal setting of the potassium content for perfect plant growth, especially for sensitive plants
  • Online Laboratory: free analysis and recommendations for the water values you have measured
  • Package contents: 1 quick test, K Potassium Test Set. Contents for approx. 25 measurements. Incl. 2 reagents, special glass vial, syringe, dosing spoon and colour scale. Refill reagents available separately
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Price: 0,00 €
Recommended retail price incl. VAT
Price: 0,00 €
Recommended retail price incl. VAT
Price: 0,00 €
Recommended retail price incl. VAT
Instructions
Product information

Healthy aquariums with conditions close to nature
The right water values are dependent on the fish stock and the plants in the aquarium. Even if the water looks clear it can be contaminated. With bad values diseases or algae can appear in the aquarium. To maintain a healthy aquarium with conditions close to nature it is important to check and adapt the water values regularly.

For each water analysis JBL provides water tests in the form of quick tests or colour change tests. These determine a certain value or several values in one go. With these water tests you can recognise algae problems and negative nitrate, nitrite, potassium, magnesium values etc.

Why test? Potassium is one of the macroelements which plants in freshwater absorb quickly and effectively within a few hours and can also store for a limited time. Growing plants require more potassium than other elements. As a result, potassium concentrations can drop to a minimum range, causing plant growth to stagnate, even if the aquarium water is fertilised regularly. Potassium levels in mains water are usually too low compared to those in natural biotopes, particularly with relation to calcium and magnesium concentrations.

Recommended potassium values:
Freshwater aquarium (community aquarium): 10-30 mg/l
Lake Malawi/Lake Tanganyika aquarium: 10-30 mg/l
Plant aquarium with few fish (aquascaping): 10-30 mg/l
Marine aquarium: the potassium content is not measurable with this test

You can analyse the water values you have measured in the JBL Online Laboratory free of charge and receive recommendations.

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Details
This product is unfortunately no longer available

JBL K Potassium Test Set

Art. no.:
2541100
EAN Code:
4014162254115
Content:
25 Tests
Volume packaging:
0.8 l
Gross weight:
127 g
Net weight:
98 g
Weight factor:
1000
Packaging dimensions (l/h/w):
43/175/105 mm

Properties

Animal species: Arowana, Axolotl, Barbels, Bettas, Bichirs/reedfish, Blowfish, Catfish, Cichlids (South America), Corals, Crayfish, Danions, Discus, Dwarf shrimps, Flowerhorn, Gobies, Goldfish, Gouramis, Guppy, Juvenile fish, Killifish, Livebearers, Loaches, Mussels, Panchaxes, Rainbowfish, Snails, Spiny eels, Tetra, Veiltails, freshwater butterflyfish
Animal size: For all animal sizes
Animal age group: All aquarium fish
Volume habitat: 25 tests
Colour: white / transparent
Dosage: Add 10 drops of reagent 1 to 15 ml sample water and mix by swirling. Add 1 level big measuring spoon of reagent 2 and swirl slightly for about 1 minute. Allow to stand for 1 minute, then lightly swirl once more.

Electronic label / illuminant

Mercury: No
Dimmable: No
This product is unfortunately no longer available

JBL K Potassium Test Set

Art. no.:
2545100
EAN Code:
4014162254511
Content:
25 Tests
Volume packaging:
0 l
Gross weight:
0 g
Net weight:
0 g
Weight factor:
0
Packaging dimensions (l/h/w):
0/0/0 mm

Properties

Animal species: Arowana, Axolotl, Barbels, Bettas, Bichirs/reedfish, Blowfish, Catfish, Cichlids (South America), Corals, Crayfish, Danions, Discus, Dwarf shrimps, Flowerhorn, Gobies, Goldfish, Gouramis, Guppy, Juvenile fish, Killifish, Livebearers, Loaches, Mussels, Panchaxes, Rainbowfish, Snails, Spiny eels, Tetra, Veiltails, freshwater butterflyfish
Animal size: For all animal sizes
Animal age group: All aquarium fish
Volume habitat: 25 tests
Colour: white / transparent
Dosage: Add 10 drops of reagent 1 to 15 ml sample water and mix by swirling. Add 1 level big measuring spoon of reagent 2 and swirl slightly for about 1 minute. Allow to stand for 1 minute, then lightly swirl once more.

Electronic label / illuminant

Mercury: No
Dimmable: No
This product is unfortunately no longer available

JBL K Potassium Reagent

Art. no.:
2541200
EAN Code:
4014162254122
Content:
refill
Volume packaging:
0.45 l
Gross weight:
46 g
Net weight:
20 g
Weight factor:
1000
Packaging dimensions (l/h/w):
30/140/107 mm

Properties

Animal species: Arowana, Axolotl, Barbels, Bettas, Bichirs/reedfish, Blowfish, Catfish, Cichlids (South America), Corals, Crayfish, Danions, Discus, Dwarf shrimps, Flowerhorn, Gobies, Goldfish, Gouramis, Guppy, Juvenile fish, Killifish, Livebearers, Loaches, Mussels, Panchaxes, Rainbowfish, Snails, Spiny eels, Tetra, Veiltails, freshwater butterflyfish
Animal size: For all animal sizes
Animal age group: All aquarium fish
Volume habitat: 25 tests
Colour: white / transparent
Dosage: Add 10 drops of reagent 1 to 15 ml sample water and mix by swirling. Add 1 level big measuring spoon of reagent 2 and swirl slightly for about 1 minute. Allow to stand for 1 minute, then lightly swirl once more.

Electronic label / illuminant

Mercury: No
Dimmable: No
FAQ
Where can I find the record sheets for the documentation of my water analysis?

Have you lost your record sheets, already filled them all in or do you need them in another language?
With the following links you can quickly and easily print out your new record sheets with recommendations for the individual parameters at home and document the water analyses.
deutsch: https://www.jbl.de/?lang=de&mod=files&func=show&id=11164
English: https://www.jbl.de/?lang=en&mod=files&func=show&id=11164
französisch: https://www.jbl.de/?lang=fr&mod=files&func=show&id=11164
niederländisch: https://www.jbl.de/?lang=nl&mod=files&func=show&id=11164

I have lost my colour chart. Can I download the colour chart for the test?

The colour cards are not available for download on the JBL website. The absolutely accurate colour reproduction that is required can only be achieved using a printer which can be re-calibrated before each printout. Most privately used printers are not accurate enough for this.

You will find the colour chart bundle as a spare part on the respective product page and in the spare parts shop under: https://www.jbl.de/en/products/detail/8732/jbl-proaquatest-assortiment-color-chart

What can I do when the measured value of a water test falls outside the scale?

If one of your measurements reaches the end of the colour chart scale you can multiply the scale by diluting later tests with distilled water (e.g. JBL Dest).

Here’s how to do it: dilute the sample with distilled water and carry out the test once more.

This works in detail as follows:
GH test: Instead of 5 ml use 10 ml aquarium water. Now 1 drop is equivalent to 0.5 dGH.
KH test: Instead of 5 ml use 10 ml aquarium water. Now 1 drop is equivalent to 0.5 dGH.

Note: when using 10 ml sample water the colour development is weaker with the first drops than with 5 ml sample water. Put the measuring container on a white underlay for a better readability.

NH4/NH3 ammonium/ammonia, NO2 nitrite, Fe iron and Cu copper:
2.5 ml sample + 2.5 ml dist. water: result times 2
1 ml sample + 4 ml dist. water: result times 5
0.5 ml sample + 4.5 ml dist. water: result times 10

NO3 nitrate, SiO2 silicate, PO4 phosphate sensitive and Mg magnesium freshwater:
5 ml sample + 5 ml dist. water: result x 2
2 ml sample + 8 ml dist. water: result x 5
1 ml sample + 9 ml dist. water: result x 10

PO4 phosphate koi high range:
2.5 ml sample + 2.5 ml dist. water: result x 2
1 ml sample + 4 ml dist. water: result x 5

K potassium:
7.5 ml sample + 7.5 ml dist. water: result x 2
3 ml sample + 12 ml dist. water: result x 5
1.5 ml sample + 13.5 ml dist. water: result x 10

K potassium in marine water:
1. Fill 10 ml of sample water with distilled water to 300 ml.
2. Follow the instructions for fresh water.
3. Multiply the test result by a factor of 30.

CO2 direct, Ca calcium and Mg+Ca magnesium+calcium: not required.

Do my water tests still work although they have been open for nine months?

Basically a sealed test keeps longer than an open one. How much the shelf life is reduced depends crucially on the handling and the storage conditions of the reagents. It may happen that a reagent in a test that has been open for 9 months doesn’t indicate correctly any more. However, additional information is needed to answer this question properly.

Blog (opinions & experiences)

Misunderstandings – typical beginner mistakes

Based on our own experience in customer service and the many messages and questions we receive, we have put together the typical mistakes beginners may make. The experienced aquarist might well smile, but if they are honest, these are mistakes we all made at the start, aren’t they?

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Granted, nobody really enjoys testing water. It’s time-consuming and sometimes you’re not sure which colour on the chart your water result matches. But water testing really can be lifesaving – at least for your fish!

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Testing Water in the Jungle

Our 15 expeditions have taught us something new: In natural waters nitrogens (ammonium/ammonia, nitrite and nitrate) and phosphates are ALWAYS scarce and below the limit of detection. Only when humans have an influence on the natural water, can nitrogens and phosphates be found.

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Plant Fertilisation with Optimised Consumption

The first step shows you how to achieve perfect water values and the second one how to modify your re-dosing to suit consumption. Unlike with standard fertilisation you adjust the fertiliser amount to your aquarium and not only save money but also get perfect looking plants.

Find out more

Testing Potassium for Perfect Plant Growth

Potassium is one of the macroelements which is quickly and effectively absorbed within a few hours and temporarily stored by plants in freshwater.

Find out more

Outline: Fertilisation in the Aquarium

The JBL plant care concept leads to vigorous and healthy growth even with the most demanding aquatic plants. JBL has all the components you need, whether it’s a fertiliser, a bottom substrate or a fully automatic CO2 fertiliser system.

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Press
15.11.2016

Terraristik-Tierärzte informieren sich über JBL Wassertests

Auf der 46. Arbeitstagung der DGHT AG ARK (Deutsche Gesellschaft für Herpetologie, Arbeitsgemeinschaft für Amphibien und Reptilienkrankheiten) vom 11.-13.11.2016 in Gera trafen sich 160 Tierärzte, um sich über Themen von Chirurgie bis Magnetresonanztomographie bei Schildkröten auszutauschen.

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16.06.2015

JBL Potassium Test for salt water

Es gibt kaum einen Meerwasserfreund, der seinem Aquarium keine Spurenelemente zugibt. Aber viele Spurenelemente-Ergänzungen enthalten zu viel Kalium, was wiederum oft zu Grünalgenproblemen führt.

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25.09.2014

New JBL Water Tests – This is how the best test

Individualized and specific plant fertilization is not really possible without these new JBL water tests, because the consumption of potassium, magnesium and CO2 varies widely from plant species to plant species.

Find out more
17.09.2014

The JBL colour chart booklet now available

Active water testers need new colour charts for their water tests from time to time. JBL is now selling a replacement for the complete colour chart booklet, which contains brief instructions and colour charts for all the water tests.

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27.07.2011

JBL and aquarium keepers help save the environment

Fast jeder Aquarianer testet Wasser und benötigt regelmäßig Nachfüllpacks für seine Wassertests. Bei JBL kann er für jeden Test Nachfüllreagenzien erhalten und schont so sein Portemonnaie und die Umwelt.

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Laboratories and calculators

Water Analysis Online Laboratory

Enter your water parameters and get an in-depth analysis of your values in a matter of seconds. You enter your water values – and we analyse! Here you have the opportunity to enter the measured water values directly into the JBL Online Laboratory. This will analyse your values and explain and submit corrective measures.
Reference guide (Themeworld)

Plant growth

Are your aquarium plants growing as well you want? Here’s how to achieve perfect plant growth

Diseases

Recognising and treating fish and invertebrate diseases

Deficiency symptoms

Here’s how to prevent deficiency symptoms in fish and plants

Algae control

Here’s how to combat algae successfully and lastingly.

Testing water

Testing water – the most important step to understanding your aquarium. Why is water testing necessary?

Plant care

What maintenance measures do your aquarium plants need?

Daily care

How much daily or weekly care is involved? What are the basic maintenance measures for your aquarium?

Fish breeding in aquariums

Would you also like to breed your fish? What do you have to consider when breeding?

Fertilising

Why do aquarium plants need to be fertilised?

Plant species

Which plant species suit your aquarium? What demands do the individual species have?

Marine water - the water

What exactly is marine water? What is so special about marine water? How to create perfect marine water?

Water tests

What water tests are available? How do water tests work? How do you test properly?

Water values

Which water tests are important? How can you achieve perfect water values?

Plants

Which aquarium plants are best? What’s the best way to plant them?

CO2 plant fertilisation

How important is CO2 plant fertilisation? Why do your plants need additional CO2? How does a CO2 system work?

The marine aquarium

Holiday at the coral reef - in your own living room! Marine aquariums are the most exciting branch of aquatics

Biotope (habitat) aquarium types

A real piece of the Amazon or, with the Congo, a piece of the heart of Africa. A habitat (biotope) aquarium is a challenge. Can you emulate nature?

Jungle aquarium type JBL Rio Pantanal®

A bit of jungle river in your living room. Lively underwater action! No problem with the JBL Rio Pantanal® aquarium

Rocky reef aquarium type JBL Malawi Rocks®

The fish of Lake Malawi are as colourful as the fish in the coral reefs. This aquarium brings a bit of freshwater reef into your living room

Goldfish aquarium type JBL Goldfish Paradise®

Lively goldfish in the aquarium enhance any room perfectly! Invite some new flatmates into your home with this goldfish aquarium.

Testing water

Water can look crystal clear and still contain a deadly poison such as arsenic. Unfortunately we are unable to assess the quality of the pond water by looking at it.

Fish care

How do you protect your new fish? What to remember when caring for fish?

Aquascaping aquarium type JBL Dreamscape®

Mountains, valleys, meadows and fish! Create your dreamlike landscape under water with the Dreamscape® aquarium
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Instructions

spare parts

assortment Test Colour Charts 

Colour charts for JBL water tests

Testlab empty + inserts 
accessories

component set for water tests 
Customer reviews

Reviews

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safety information in accordance with GHS

Signal word: Danger

Hazard symbol

  • GHS05

Risk phrase

H314: Causes severe skin burns and eye damage.

safety note

P101: If medical advice is needed, have product container or label at hand.
P102: Keep out of reach of children.
P103: Read label before use.
P280: Wear protective gloves/protective clothing/eye protection/face protection.
P305+P351+P338: IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
P310a: Immediately call a POISON CENTER/doctor.
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Sustainability at JBL
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