JBL Denitrol 250ml

Adds millions of beneficial, autotrophic and pollutant-degrading bacterial strains to the aquarium water, allowing fish to be introduced immediately. Highly recommended after the use of medication and complete cleaning.

27.85 EUR

Price incl. 23 VAT plus Delivery
Base price 111.4 EUR / l
In stock – delivered to you in 1-3 working days
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Product features

  • Adds millions of beneficial, autotrophic and pollutant-degrading bacterial strains to the aquarium water, making immediate fish stocking possible. Highly recommended after using medications or after a complete water change
  • Shake the bottle well, measure the right amount in the dosing lid and evenly distribute in the aquarium
  • Live bacteria cultures with enzymes for rapid pollutant degradation in fresh, brackish & marine water. The bacteria have been inactivated so that they don't need food (NH4, NO2) in the bottles and do not produce NO3. Activation through water contact
  • It is no use simply waiting for a healthy bacterial population to grow in your aquarium, as hardly any beneficial bacteria will develop in a new tank without water pollution. Bacteria only react and reproduce when they have a lot of food (NH4, NO2).
  • Package contents: 1 bottle Denitrol. Use: 10 ml for 20 l water during the initial setup and with disease, 10 ml for 300 l water during water changes

Noch offene Fragen?

In unserem FAQ‑Bereich findet ihr Antworten auf die am häufigsten gestellten Fragen. Solltet ihr hier nicht fündig werden, zögert bitte nicht, uns direkt zu kontaktieren – wir helfen euch gerne weiter.

  • 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.

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  • 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.

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  • Do I have to turn off the UV clarifier when I add JBL Denitrol to my aquarium?

    Yes, this is necessary. The bacteria need a little time to settle on the substrate. Until then they are floating freely in the water so that the UV-C radiation can kill them off. It is therefore recommendable to switch off the UV-C clarifier for 48 hours.

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  • Do the "filter bacteria" pose a risk to sensitive persons, as they could potentially be transmitted by air?

    No, these bacteria are generally harmless to humans. _x000D_ They can not get into the air, as nitrifying bacteria are generally substrate bound and bound to a medium that is aqueous to at least moist.

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  • How are the filter bacteria (nitrobacter) preserved in the bottles? How can the bacteria survive inside?

    The bacteria in the products are contained in a nutrient solution which meets the "minimum requirements", as full-scale metabolism would shorten the shelf life. As long as the bottles are in their original packaging and stored at temperatures between 4-35 °C the shelf life is 18 months. _x000D_ _x000D_ If the liquid is clear or has occasional small brownish flocks, the product is fine. The smell should be barely discernible. If the liquid smells of rotten eggs or if it contains black flakes, the product is no longer suitable for use.

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  • 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. _x000D_ _x000D_ In this case, the following procedure is recommended: _x000D_ _x000D_ 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. _x000D_ _x000D_ 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.

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  • If I want to add live bacteria to my aquarium, do I need to switch off the UV-C device?

    Yes, this would be useful. The bacteria, as for example in JBL Denitrol or JBL PROCLEAN BAC, need a little time to settle on the substrate. Until then they are floating freely in the water so that the UV-C radiation can kill them off. It is therefore recommendable to switch off the UV-C device for a day.

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  • 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.

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  • 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.

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  • Can you overdose Denitrol?

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

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