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

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  • 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 20 l water during initial setup and disease, 10 ml for 300 l water during water change
Find out more
10,70
basic price 10.7 EUR / 100 ml
Recommended retail price incl. VAT
Dealer close to you
You can find this article at your specialist shop and online
21,48
basic price 8.59 EUR / 100 ml
Recommended retail price incl. VAT
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 Biotopol) 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.

Videos
Details
This product is unfortunately no longer available

JBL Denitrol 100 ml

Art. no.:
2306151
EAN Code:
4014162014405
Content:
100 ml
Range:
3000 l
Volume packaging:
0.23 l
Gross weight:
124 g
Net weight:
100 g
Weight factor:
1000
Packaging dimensions (l/h/w):
30/125/60 mm

Properties

Animal species: Terrapins, Tropical Terrapins, Turtles, Tetras, Barbels, Danionins, Livebearers, Cichlids - Small “Predators”, Cichlids - Algae Eaters, Cichlids - Large “Predators”, Labyrinth Fish, Goldfish, Veiltails, Catfish, Loaches, Blowfish, Spiny eels & Reedfish, Butterflyfish & Panchaxes, Killifish & Rainbowfish, Juvenile Fish, Silver arowana, Axolotl, Shrimps and dwarf crayfish, Discus fish, Marine fish, Corals, Crustaceans, Guppy, fighting fish, Flowerhorn cichlids, shrimps, cichlids: angelfish, discus, snails, molluscs, Axolotl (cool waters), newts (cool waters)
Animal size: For all animal sizes
Animal age group: All aquarium fish
Volume habitat: 3,000 L
Material: Various strains of water cleaning bacteria (nitrosomonas, nitrobacter and others) in buffer solution. All bacteria belong to the risk class R1.
Colour: transparent
Dosage: When setting up an aquarium or after disease treatment: 10 ml per 20 l. For a partial water change: 10 ml per 300 l. Please use a double dose in saltwater
Transport conditions: Do not store at temperatures below 0°C or above 40°C; short term transport below 0°C is not a problem and does not affect its functioning.

Electronic label / illuminant

Mercury: No
Dimmable: No
Socket designation: When setting up an aquarium or after disease treatment: 10 ml per 20 l. For a partial water change: 10 ml per 300 l. Please use a double dose in saltwater

Technical Data

Height:125 mm
Length:60 mm
Width:30 mm
This product is unfortunately no longer available

JBL Denitrol 250 ml

Art. no.:
2306251
EAN Code:
4014162014467
Content:
250 ml
Range:
7500 l
Volume packaging:
0.46 l
Gross weight:
293 g
Net weight:
252 g
Weight factor:
1000
Packaging dimensions (l/h/w):
33/180/78 mm

Properties

Animal species: Terrapins, Tropical Terrapins, Turtles, Tetras, Barbels, Danionins, Livebearers, Cichlids - Small “Predators”, Cichlids - Algae Eaters, Cichlids - Large “Predators”, Labyrinth Fish, Goldfish, Veiltails, Catfish, Loaches, Blowfish, Spiny eels & Reedfish, Butterflyfish & Panchaxes, Killifish & Rainbowfish, Juvenile Fish, Silver arowana, Axolotl, Shrimps and dwarf crayfish, Discus fish, Marine fish, Corals, Crustaceans, Guppy, fighting fish, Flowerhorn cichlids, shrimps, cichlids: angelfish, discus, snails, molluscs, Axolotl (cool waters), newts (cool waters)
Animal size: For all animal sizes
Animal age group: All aquarium fish
Volume habitat: > 7,500 L
Material: Various strains of water cleaning bacteria (nitrosomonas, nitrobacter and others) in buffer solution. All bacteria belong to the risk class R1.
Colour: transparent
Dosage: When setting up an aquarium or after disease treatment: 10 ml per 20 l. For a partial water change: 10 ml per 300 l. Please use a double dose in saltwater
Transport conditions: Do not store at temperatures below 0°C or above 40°C; short term transport below 0°C is not a problem and does not affect its functioning.

Electronic label / illuminant

Mercury: No
Dimmable: No
Socket designation: When setting up an aquarium or after disease treatment: 10 ml per 20 l. For a partial water change: 10 ml per 300 l. Please use a double dose in saltwater

Technical Data

Height:180 mm
Length:78 mm
Width:33 mm
FAQ
High nitrite value - addition of bacteria and effects

When JBL Detoxol is used free ammonium is bound in the water, which provides immediate relief for the fish. This removal of ammonium also prevents any further nitrate from forming. Any nitrite already present is not bound. If you have high nitrite values, carry out a water change beforehand. A subsequent addition of bacteria will help you maintain a sustainable and biological removal of ammonium and nitrite.

What happens, when Denitrol has been dosed and the animals aren’t added until several days later?

If you don’t immediately add your animals, the cleansing bacteria included in Denitrol will quickly die from lack of food. If you wait a few days before adding the animals (against the advice of these instructions) problems will occur with ammonium/ammonia and nitrite. In the end, the bacteria will not be able to develop and will die off due to a lack of food. As a result the ammonium excreted by the fish will not be broken down. Since no bacteria are present to oxidise ammonium into nitrate in two steps, a nitrite peak will occur despite the application. If the first fish are introduced immediately after the addition of Denitrol, the purification bacteria get food and begin to multiply. This is comparable to an unathletic person who starts doing sports and first has to "train up" his fitness. This ensures that there are enough bacteria right from the start and that neither ammonium/ammonia nor nitrite become a problem when more fish are added. Please always increase the fish stock moderately and only after a few days.

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.

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.

Can you overdose Denitrol?

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

Show more FAQs ...
Blog (opinions & experiences)

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The JBL Interns - JBL Aqua-Myths #3

Hi guys, Here comes a new episode of JBL Aqua Myths. This time we’re looking at the following 3 myths...

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Automatic water change - No drips and spills!

Today let’s talk about making the water change less messy, to save the living room carpet from getting ruined.

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TITEL FEHLT

Hi guys, During my work at JBL I have been confronted time and again in various forums, posts or social media with theories in aquaristics which are often considered to be correct - but in reality do not correspond to the truth at all. For this reason we thought we’d start a short series called: JBL Aqua-Myths.

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JBL TV #20: Bacterial starters for aquariums - a waste of money or absolutely essential?

All you need to know about bacterial starters for aquariums: Should you wait 2 weeks after setting up the aquarium or use a bacterial starter straight away?

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JBL TV #19 Part 6: Aquarium set-up - water preparation, starting, attaching background pictures

How do you prepare your water correctly before starting an aquarium? How do you get a biological balance?

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The JBL Intern - Aquariums in the Company

When I first entered the administrative offices, I was very impressed by the display aquariums in the boss's office and in the various conference rooms.

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Video: JBL Denitrol - Bacterial Starter for the Right Aquarium Start

When you set up an aquarium you also need to set up the biology in the water properly. It’s vital to add active cleansing bacteria to break down any pollutants and make the water habitable for the fish

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JBL TV #10: How to start an aquarium

Why do you need a bacteria starter? What happens if you run an aquarium without a bacteria starter?

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JBL TV #7: Why do fish die in high nitrite levels and what can be done about it?

How does the nitrogen cycle in the aquarium work? Why do nitrite values get too high and how can the value be reduced? Why adding salt is senseless.

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Moving With Your Aquarium – The Checklist

But wait, how do I transport my aquarium(s) from A to B? What ’s important here? We have put together a checklist-like post that explains the process, so you won’t forget anything.

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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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Lack of oxygen in the morning

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

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Time For A Change - Pros And Cons

Think back to your childhood. Your bedroom was a small area for you to let your imagination run free. And unsurprisingly you felt like re-decorating and rearranging it at least every three weeks.

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MSAD Team 1: Mirror For A Pond

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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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Care products - The best solutions for your aquarium

With the right products, aquarium care is not only easy, but can also be a lot of fun! The formulas that make up JBL products are based on intensive research and, especially with care products, their effects are not always immediately visible, yet in the medium and long-term they’ll result in a beautiful aquarium and healthy fish.

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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.

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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.

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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.

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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.

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Press

19.11.2018

Frost can’t harm JBL bacteria starter any more

Till now, JBL bacteria starters were delivered with special polystyrene heat packs during frost periods or, in very low temperatures, not delivered at all. This is now a thing of the past!

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30.01.2018

20 Years L046 Hypancistrus Zebra

In 1998 I bought my first 3 juvenile zebra plecos. At that time they cost about 300 Schilling (€ 15) each in the shops. Gradually my small group grew to 10 animals.

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28.11.2017

JBL Frost Protection for Living Bacteria

Bacteria really are sensitive little chaps: in summer they don’t like temperatures above 35 degrees and in winter they die when they catch a frost.

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15.05.2012

Es glibbert sich besser mit JBL

Das Sealife Center in Speyer hat unter der Leitung des biologischen Kurators, Arndt Hadamek, eine hoch interessante neue Quallen-Sonderausstellung für die Besucher im Angebot. Folgende Quallenarten werden lebend in Spezialaquarien gezeigt:

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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.

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.
Reference guide (Themeworld)

Filter material as troubleshooter

Which filter media combats which problems? What you need to optimise water values?

Kinds of cloudiness

Different kinds of cloudiness and how to combat it?

Reducing problematic water values

How to lower critical water values.

Diseases

Recognising and treating fish and invertebrate diseases

Daily care

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

Marine water - the water

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

Water values

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

Bacterial initial phase

How do you start an aquarium with bacteria properly? When do you need to bacterially inoculate the water?

Run-in phase

What do you need to consider during the initial phase (run-in phase) of your aquarium? When can you add fish?

Setting up an aquarium

How is an aquarium set up? What do you have to consider? Step by step to a beautiful aquarium

UV-C

Would you like to get your green water clear again? Would you like to decrease the germ counts in the aquarium water? Would you like to use technical items instead of liquid preparations to clear your water?

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?

Aquascaping aquarium type JBL Dreamscape®

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

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®

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Download

Instructions

safety instructions

  • safety instruction for water conditioners
    • Filename:
      safety_instructions_Wasseraufbereitung.pdf
    Download
  • JBL Denitrol
    Download
Customer reviews

Reviews

Overall rating: 5.0
6 public review(s) for this product.

0 Reviews

6 more reviews in other languages

6 Reviews in other languages

aquascaping.tv - German
2021-07-08T16:49:11Z

Bakterie w akwarium są mega ważne. Kto o to nie dba niedługo może mieć problemy z glonami. Polecam.


der_ aquariumschrank - German
2021-06-19T15:49:19Z

tangelo.shrimps - German
2021-05-06T09:04:42Z

Ich benutze sie für jedes neue Aquarium, das ich eingerichtet habe.


Aquarium_Zimmer - German
2021-03-23T20:35:52Z

Sehr gut zum Start eines Aquariums.

Bei mir hat es den Nitritwert beim Einlaufen auf Null gehalten.


der_ aquariumschrank - German
2021-01-25T12:08:23Z

Darf bei kein Wasserwechsel fehlen.


Aquawelten - German
2021-01-22T14:23:02Z

Kurz und Knapp. Einfach super! Habe es bei Neustart beigegeben und bei jedem Wasserwechsel auch. Danke JBL, super Saft :)


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