JBL Denitrol
Bacteria starter for adding aquarium fish to freshwater and saltwater aquariums

  • For aquarium water to suit both fish and plants: when setting up a new aquarium, water changes and after fish diseases for freshwater and saltwater aquariums, turtle and shrimp tanks
  • Shake the bottle well, measure the right amount in the dosing lid and evenly distribute in the aquarium
  • Live bacteria with enzymes for the rapid breakdown of pollutants
  • Healthy water, healthy fish: breakdown of fish excrement and other waste by means of special enzymes and cleansing bacteria
  • Contents: 1 bottle Denitrol. Use: 10 ml for 100 l water during initial setup and disease, 10 ml for 300 l water during water change
Find out more
basic price 8,56 EUR / 100 ml
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
basic price 6,87 EUR / 100 ml
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

Nature at home – home for fish and plants
Fish need to be as comfortable in the aquarium as they are in nature. When setting up an aquarium and during partial water changes the aquarium needs sufficient bacteria to be biologically cleaned and to quickly break down harmful substances. Bacterial starters contain highly active beneficial bacteria which break down the ammonium/ammonia and nitrite as well as the fish excrements and other waste in the water.

Advantages of the JBL bacterial starters
Live bacteria, breakdown of ammonium/ammonia and nitrite through active bacteria, breakdown of fish excrement and other waste.

8 complementary bacteria cultures to break down protein (heterotrophic bacteria), ammonium and nitrite. Gradually start with the stocking of fish in newly set-up aquariums immediately after adding JBL Denitrol.

The opinions vary as to whether fish can be added as early as one day after the aquarium set-up. Microbiologists have observed that bacteria reproduce very slowly in a new aquarium when there is no water pollution (nutrition for bacteria). But if you add fish the next day without using a bacterial starter, problems with ammonium/ammonia can occur because the bacteria initially reproduce too slowly to keep pace with the production of pollutants. When using JBL Denitrol (15 minutes after adding JBL Biotipol) higher quantities of bacteria are present. The next day, after the first fish have been added, there is food for the bacteria and they start to reproduce. This will make sure that there are always enough bacteria, so that neither ammonium/ammonia or nitrite will become a problem.

Details

JBL Denitrol 100 ml

Art. no.:
2306110
EAN Code:
4014162014399
Content:
100 ml
Range:
3000 l
Volume packaging:
0.230 l
Gross weight:
124.000 g
Net weight:
100 g
Weight factor:
1000
Size(l/h/w):
30/125/60 mm

JBL Denitrol 250 ml

Art. no.:
2306200
EAN Code:
4014162230621
Content:
250 ml
Range:
7500 l
Volume packaging:
0.460 l
Gross weight:
293.000 g
Net weight:
252 g
Weight factor:
1000
Size(l/h/w):
33/180/78 mm
FAQ
What happens, when Denitrol has been dosed and the animals aren’t added until several days later?

Without an immediate insertion of animals the cleansing bacteria added with Denitrol will die from lack of food within a short period. If you insert the animals after several days (contrary to these instructions) problems will occur with ammonium/ammonia and nitrite.
If you insert the first fish immediately after adding Denitrol the cleansing bacteria will receive nutrition and start to reproduce. This ensures that there are enough bacteria available from the start to prevent problems with ammonium/ammonia or nitrite.

May I feed the animals on a regular basis during the first three weeks?

No, you need to feed them very sparingly with maximum 25% of the usual amount. The bacteria are adapting to the current water load and may not be overstrained. A slow increase allows the bacteria a stable adaptation to their environment.

How many fish, shrimps or snails may be inserted after 15 minutes?

After adding JBL Denitrol into initially set up aquariums you can add 1 cm fish per 2 litres of water. You can raise the fish stock after 14 days.

Can you overdose Denitrol?

With Denitrol you can add up to five times the amount of a dose.

Despite JBL Denitrol, the nitrite level has not dropped.

In order to answer this question, we would need to know the current nitrite level and how it has developed in the course of 4 hours after feeding. If the nitrite levels are high, an inhibition of the bacterial decomposition of nitrite may occur.

In this case, the following procedure is recommended:

1) Do a large water change in accordance with the nitrite level - at least 50 % if it is over 1.0 mg/l - in order to decrease the current nitrite level.

2) Add a large dose of JBL Denitrol to the tank, around 250 ml per 150 l of tank water. Aerate the tank or set the filter outflow so that it creates enough turbulence to bring in oxygen. The whitish cloudiness caused by the bacteria will disappear within a few hours and the bacteria will then quickly start processing the ammonium/ammonia and nitrite.

Show more FAQs ...
Blog – Opinions & Experiences

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.

Find out more

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.

Find out more

21.03.2017

Tip: How to replace internal & external filters properly.

Every aquarium owner knows the situation: a filter needs to be replaced, but you’re not sure what the best way is to do it. Nobody wants to risk disturbing the filter bacteria because this could endanger the wellbeing of the aquarium dwellers.

Find out more

29.01.2017

Bacteria starter – starting an aquarium without a run-in phase – Part 2

In the previous post we discussed the use and necessity of bacteria products in aquariums. In this one we will answer your frequently asked questions on the subject.

Find out more

23.01.2017

Bacteria starter – starting an aquarium without a run-in phase – Part 1

Bacterial preparations for aquariums have been on the market for more than 20 years. That’s a very long time. From the start they were used to establish healthy bacterial flora or as an emergency measure to quickly add fish to a freshly set up aquarium.

Find out more

08.10.2016

Social Escape – an aquarium slowly and relaxingly takes shape and is the antidote to burn out.

Social stands for online marketing and social media. Escape means a way out of our fast moving digital lives and a way into another world. A balancing haven of peace and relaxation.

Find out more
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.

Online Hospital

Do you have ill fish and you don’t know what disease it is and how to treat it? Here you can diagnose diseases using photos or identification keys and you can find out where they come from and how to treat them. By showing you over 500 photos to identify and cure fish diseases, we enable you to find a diagnosis and solution.
Worth reading

Setting up an aquarium

Here you will learn how to set up your aquarium. In the film we show you the step-by-step instructions. The brochure “Setting up an aquarium” contains all information you need when setting up a new aquarium.

Aquarium problems

Are you faced with algae problems or don’t your aquarium plants grow well? Is the water cloudy or are your fish ill? Don’t your water parameters correspond to your expectations? Our team of experts has thoroughly analysed the problems that occur in the aquatic field and offers you solutions which really work.

Setting up a saltwater aquarium

You will find ideas and help for all questions related to your aquarium here, no matter if it’s about fish diseases, water analysis or how to set up an aquarium. You will also find the latest trends and activities which could be important for you.

Optimising water values

Having the correct water values guarantees you a functioning and beautiful marine aquarium. We’ll show you how to get them.
Download

safety instructions