JBL Algol 250ml

For beautiful freshwater aquariums: Intensively combats all types of algae (including green water = suspended algae)
Item no. 2302300
Operating instructions

Use biocides safely. Always read the label and product information before use.

Registered at the Federal Institute for Occupational Safety and Health under BAUA number N-19236
Baua no. for JBL Algol

Algol 100ml

21.43 EUR

Price incl. 20 VAT plus Delivery
Base price 85.72 EUR / l
In stock – delivered to you in 1-3 working days
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Product features

  • For beautiful freshwater aquariums: Intensively combats all types of algae (including green water = suspended algae)
  • Ideally apply in the morning (low pH). Recommended before use: change 30% of the water. Ensure sufficient oxygen content during use by aerating the water. Repeat after 5 days if necessary
  • Against all types of algae in freshwater aquariums. Copper-free!
  • Harmless to fish and microorganisms when used properly
  • Contents: 1 bottle of Algol. Application: 10 ml/40 l water. Example: 60 l aquarium: 15 ml

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 to the algae after I use an anti-algae agent?

    Any anti-algae agent, such as JBL AlgoPond forte, AlgoPond green or Algol cause the dead algae to decompose biologically and then be broken down bacterially. This in turn leads to an enormous oxygen consumption by the bacteria (nitrification) and to the release of the nutrients nitrate and phosphate, which were "bound" in the algae. In principle, this feeds the next generation of algae. This is the reason why JBL always recommends binding the released nutrients as the last step in algae control after the targeted control of the algae with an anti-algae agent. Since it is sufficient to remove one of the two nutrients, we recommend you remove the phosphate, and this can easily be carried out with a good phosphate remover (JBL PhosEx Pond or JBL PhosEx). _x000D_ _x000D_ By the way, it is always better to remove dying or dead algae by hand. The fewer algae are degraded, the fewer nutrients are released again!_x000D_

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  • When do I change the water when using the anti-algae agent JBL Algol?

    The start of the application of the anti-algae agent begins with a partial water change of at least 30 %, as described on the product label. A re-dosing is possible after 5 days in case of persistent infestation. Carry out a new water change before re-dosing. If the application is not repeated, a water change is still recommended to reduce the water pollution caused by dead algae.

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  • I have a lot of algae in my cichlid tank. Unfortunately, one-time treatment with JBL Algol did not have any noticeable effect.

    With reference to algae in cichlid tanks. That is a permanent problem, because there is always an excess of nutrients in aquariums with few plants. It may be necessary to add more doses of JBL Algol, more or less at weekly intervals. Please make sure you always carry out a 50 % water change beforehand and ensure the aquarium is well aerated.

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  • How do mosses react to JBL Algol?

    When dealing with mosses, one must always reckon with sensitivities to Algol, depending on the species, with this always applying to moss balls. Midget shrimps can also exhibit a sensitive reaction to Algol; our experience varies according to the species. The general water parameters are also important.

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  • Is JBL Algol harmful for my shrimps?

    Negative effects of JBL Algol on freshwater shrimps cannot be ruled out, especially on sensitive dwarf shrimps.

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  • Can I kill off blue-green algae with JBL Algol?

    Blue-green algae, that is quite a complicated matter._x000D_ _x000D_ As is generally known, blue-green algae are bacteria. They photosynthesise, just like plants. Blue-green algae are among the oldest organisms in the world. They would have been extinct a long time ago if they didn’t have a few special properties. For example, they influence the medium on which they colonise to their own advantage, i.e. manipulate the environmental parameters (which only very few organisms are able to do). This property has secured their survival. In their natural surroundings, blue-green algae are absolute niche inhabitants, which are always inferior to other organisms in competition._x000D_ _x000D_ Blue-green algae need light and nutrients, just like plants._x000D_ _x000D_ Blue-green algae, though, also need a substrate for colonisation to grown on. They are inferior to "normal" biofilms both in nature and in an aquarium and can only spread if the “normal” biofilm has been destroyed and has partially died off. Then they colonise quickly and consequently grow over the “normal” biofilm. As they change the water parameters under their own film, the normal biofilm dies off expansively, and the blue-green algae aquarium is born._x000D_ _x000D_ Algaecides are only effective against blue algae to a certain degree. _x000D_ _x000D_ The only effective method currently known is deprivation of light, meaning full deprivation, to which they exhibit a very sensitive reaction._x000D_

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  • In what intervals can JBL Algol be dosed ?

    We recommend an interval of 7 days when dosing JBL Algol again. Please ensure that a water change of 50-70% is carried out before each dose. _x000D_ _x000D_ Please note that we cannot rule out adverse effects on aquatic plants after repeated applications. Furthermore JBL Algol does not eliminate the cause of emerging algae growth. For this please examine the care and maintenance of your aquarium.

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