JBL Oxygen Test O2 - New Formula
Quick test for the determination of the oxygen content in freshwater and marine water aquariums and ponds

  • To determine the current oxygen content and as a result indicates whether measures to increase the O2 content need to be taken
  • Quick test for monitoring the aeration: fill glass vial with sample water, add reagents. Read value of sample off colour chart
  • When to use: once a week in newly set up aquariums and if there are signs of oxygen deficiency. Clear, significant colour indication from yellow to wine-red
  • In the JBL Online Laboratory of the JBL homepage you can enter test results to immediately and freely receive an analysis of your values
  • Package contents: 1 quick test for approx. 40 measurements. Incl. 3 reagents, glass vial with screw cap and colour chart. Refill reagents available separately
For more information
Recommended retail price incl. VAT
Available from your specialist dealer.
Dealer close to you
You can find this article at your specialist shop and online
Recommended retail price incl. VAT
Available from your specialist dealer.
Dealer close to you
You can find this article at your specialist shop and online
Product information

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

Why test?
The well-being of aquarium and pond dwellers and the growth of aquatic plants depend to a large extent on the O2 level being kept as constant as possible. Oxygen is the “elixir of life” for all animal organisms. All animals in the aquarium and pond need oxygen to breathe. But the “invisible helpers” in the aquarium and pond, the bacteria that break down pollutants, also depend on sufficient supplies of oxygen in order to be able to carry out their useful activities. In aquariums and ponds with little or no planting and in marine aquariums the oxygen content always needs to be kept at an adequate balance using technical equipment. The water absorbs oxygen through the water surface. The more the surface is moving the more oxygen is absorbed. In case of dying algae and during the use of many medications the oxygen content in the water needs to be increased by aeration.

JBL Online Laboratory on the JBL website in the main menu under “Service”:
Regular control for a healthy aquarium/pond with conditions close to nature. Enter your water values into the JBL Online Laboratory and get an in-depth analysis of your values (free of charge) within seconds.

Recommended oxygen content:
Freshwater aquarium (community aquarium): 5-8 mg/l
Lake Malawi/Lake Tanganyika aquarium: 5-8 mg/l
Plant aquarium with few fish (aquascaping): 5-10 mg/l
Marine aquarium: 5-10 mg/l
Pond: 5-10 mg/l.

Details

JBL Oxygen Test O2 - New Formula

Art. no.:
2537400
EAN Code:
4014162253743
Content:
ca. 40 tests
Volume packaging:
0.000 l
Gross weight:
105.000 g
Net weight:
76 g
Weight factor:
0
Size(l/h/w):
43/175/106 mm

JBL Oxygen Reagent O2 - New Formula

Art. no.:
2537300
EAN Code:
4014162253736
Content:
refill
Volume packaging:
0.450 l
Gross weight:
65.000 g
Net weight:
30 g
Weight factor:
0
Size(l/h/w):
30/140/107 mm
FAQ
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. For this a guaranteed true colour print is required, and you need 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 spare part on the respective product page and in the spare parts shop.

Which of the three scales on the colour cards symbolize of the water tests saltwater, freshwater and garden pond ?

koi carp = garden pond
angel fish = saltwater
discus = freshwater

Which scale applies for my aquarium? My test has two or three control fields with fish and recommendations.

We repeatedly receive questions regarding the symbols on the water test. The hobby areas cannot be clearly assigned to the scales for analysis. There are three symbols to make the hobby areas on the colour charts clear:

Discus = fresh water
Emperor = salt water
Koi = garden pond

In the following, you will find a list which assigns the scale for analysing the results from measurements in the hobby area and explains the symbols: The scales are described from the top to the bottom here.

NO3: salt water, fresh water, garden pond
pH 6.0 – 7.6: fresh water, garden ponds
pH 7.4 – 9.0: salt water, fresh water, garden pond
Fe: fresh water, garden pond

The following JBL tests have a uniform scale for all 2 or 3 hobby areas for analysis of the results from the measurements, as differentiation is no longer necessary:

SiO2
Cu
NH4
NO2
PO4
pH 3-10
O2

Is it possible that the JBL oxygen test O2 flocculates slightly after the addition of the 2nd reagent?

Yes, this is possible and normal (formation of manganese dioxide). Please shake the test vessel thoroughly before referring to the colour scale.

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

21.09.2018

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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06.09.2018

Lack of oxygen in the morning

The fish stay under the water surface in the morning, gasping for air.

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27.07.2018

Your pond’s health in summer

The care of your garden pond depends on the season. In spring you have other jobs than in autumn. But what needs doing in summer?

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25.06.2018

How often do you need to test your pond or aquarium water?

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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23.02.2018

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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16.07.2017

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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20.04.2017

Pflegemittel - Die besten Lösungen für Ihr Aquarium

Mit den richtigen Produkten ist die Aquarienpflege nicht nur einfach, sondern kann auch viel Spaß machen! Die auf intensiver Forschung basierenden Zusammensetzungen der JBL Produkte sind zwar gerade bei Pflegemitteln nicht immer auf den ersten Blick erkennbar, aber auf jeden Fall mittel- und langfristig am schönen Aquarium und gesunden Fischen abzulesen.

For more information

20.04.2017

Pflegemittel - Die besten Lösungen für Ihr Aquarium

Mit den richtigen Produkten ist die Aquarienpflege nicht nur einfach, sondern kann auch viel Spaß machen! Die auf intensiver Forschung basierenden Zusammensetzungen der JBL Produkte sind zwar gerade bei Pflegemitteln nicht immer auf den ersten Blick erkennbar, aber auf jeden Fall mittel- und langfristig am schönen Aquarium und gesunden Fischen abzulesen.

For more information

22.10.2016

Inaccurate water tests – or did I do something wrong after all?

In the aquarium scene we often hear people talking about “accurate” and “inaccurate” tests. But mostly they mean a rougher or finer scaling of the output values.

For more information

28.09.2016

Testing water – here’s how

The water in your aquarium is outstandingly significant because it is a life-giving element for fish and plants.

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18.09.2016

Keeping an eye on the most important water values

Professional water analysis sounds very expensive. But the professional water testing in your aquarium or pond at home also works on a high level and above all it is simple and inexpensive.

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21.09.2015

Treating fish diseases before they arise

Even if your fish have fallen ill, it is not too late. Nonetheless we want to save the fish from getting ill. About 90 % of all fish diseases are the result of a weakening of the immune system.

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Press

New JBL Oxygen Test With Red Instead Of Beige

New scientific findings need to be taken advantage of. The JBL research and development department has greatly increased the accuracy of their test by using a third reagent and

For more information

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.

For more information
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Instructions

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safety instructions

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spare parts
accessories