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JBL Algol
Anti-algae agent to combat algae in freshwater aquariums

              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
              • For beautiful freshwater aquariums: combats all algae species (even green water = floating algae) intensively
              • Application best in the morning (low pH). A partial water change of 30 % is recommended before use. Ensure there is sufficient oxygen content by aerating during the treatment. Repeat after 5 days if necessary
              • Combats all types of algae in freshwater aquariums. Without copper!
              • Not harmful to fish and microorganisms when used correctly
              • Contents: 1 bottle Algol. To use: 10 ml/40 l water. Example with 60 l aquarium: 15 ml
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              Price: 8,63 €
              basic price 86.3 EUR / l
              Recommended retail price incl. VAT
              You can find this item in your specialist and online shop
              Dealer close to you
              Price: 17,22 €
              basic price 68.88 EUR / l
              Recommended retail price incl. VAT
              You can find this item in your specialist and online shop
              Dealer close to you
              Instructions
              Product information

              Appropriate and long-term algae control:
              Excessive algae growth always occurs when there are too many nutrients (phosphates and nitrates) in the water. That’s why long-term algae control always works in two steps: it combats algae with the anti-algae agent JBL Algol, then in step 2 it safely binds the nutrients. JBL PhosEx ultra is ideal for this purpose. Adding algae-eating animals, such as sucker catfish, shrimps and snails can also be a great help.

              Videos
              Details

              JBL Algol 100 ml

              Art. no.:
              2302200
              EAN Code:
              4014162230225
              Content:
              100 ml
              Range:
              400 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: Arowana, Axolotl, Barbels, Bettas, Bichirs/reedfish, Blowfish, Catfish, Cichlids (South America), Crayfish, Danions, Discus, Flowerhorn, Goldfish, Gouramis, Guppy, Juvenile fish, Killifish, Livebearers, Loaches, Newts, Panchaxes, Rainbowfish, Snails, Spiny eels, Tetra, Veiltails, freshwater butterflyfish
              Animal size: For all animal sizes
              Animal age group: All aquarium fish
              Volume habitat: 400 L
              Material: 3- (4-chlorophenyl) -1-methoxy-1-methyl carbamide, sodium carboxymethyl cellulose, methyl paraben, propylene glycol, tartrazine, purified water
              Colour: green / white
              Dosage: 10 ml per 40 l water for total water volume
              Transport conditions: For this type of product we recommend transport and storage at room temperature.

              Electronic label / illuminant

              Mercury: No
              Dimmable: No

              Technical Data

              Height:125 mm
              Length:60 mm
              Width:30 mm

              JBL Algol 250 ml

              Art. no.:
              2302300
              EAN Code:
              4014162230232
              Content:
              250 ml
              Range:
              1000 l
              Volume packaging:
              0.46 l
              Gross weight:
              300.2 g
              Net weight:
              252 g
              Weight factor:
              1000
              Packaging dimensions (l/h/w):
              33/180/78 mm

              Properties

              Animal species: Arowana, Axolotl, Barbels, Bettas, Bichirs/reedfish, Blowfish, Catfish, Cichlids (South America), Crayfish, Danions, Discus, Flowerhorn, Goldfish, Gouramis, Guppy, Juvenile fish, Killifish, Livebearers, Loaches, Newts, Panchaxes, Rainbowfish, Snails, Spiny eels, Tetra, Veiltails, freshwater butterflyfish
              Animal size: For all animal sizes
              Animal age group: All aquarium fish
              Volume habitat: 1,000 L
              Material: 3- (4-chlorophenyl) -1-methoxy-1-methyl carbamide, sodium carboxymethyl cellulose, methyl paraben, propylene glycol, tartrazine, purified water
              Colour: green / white
              Dosage: 10 ml per 40 l water for total water volume
              Transport conditions: For this type of product we recommend transport and storage at room temperature.

              Electronic label / illuminant

              Mercury: No
              Dimmable: No

              Technical Data

              Height:180 mm
              Length:78 mm
              Width:33 mm
              FAQ
              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.

              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).

              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!

              Is JBL Algol harmful for my shrimps?

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

              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.

              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.

              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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              Blog (opinions & experiences)

              JBL TV #69 Algae in the aquarium - causes and solutions - Part 1

              The first part is about successful algae control in the aquarium.

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              JBL TV #46: Clear view in the aquarium - Getting cloudy water clear

              Biologist Heiko Blessin explains the causes of cloudy aquarium water and the ways to get it crystal clear again.

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              JBL TV #23: Cloudy water in the aquarium? These measures will help!

              We’ll go through all the different types of cloudiness and discolouration, explaining how to treat each one.

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              JBL TV #2: Why do algae grow in the aquarium and how can you stop it?

              When algae take over the aquarium, there are always one or two possible causes. In this video, biologist Heiko Blessin explains very clearly and comprehensibly why algae grow at all and what we aquarium enthusiasts can do about it. The topic of algae in the aquarium has never been explained in a simpler and more understandable way!

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              Getting rid of diatoms - no problem at all

              If a brown coating covers the substrate of your aquarium and looks unattractive, let’s hope it is diatoms! The alternative would be smear algae - and they are not as easy to get rid of as diatoms.

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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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              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

              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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              Press
              14.10.2016

              JBL receives the European authorisation to sell anti-algae agents

              Since the company was founded, JBL GmbH & Co. KG has been carrying out research in the field of water care for aquariums and garden ponds. The success of our care products and our acceptance to the Article 95 list of the European Chemicals Agency for the active substance monolinuron both confirm

              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.
              Reference guide (Themeworld)

              Kinds of cloudiness

              Different kinds of cloudiness and how to combat it?

              Algae control

              Here’s how to combat algae successfully and lastingly.

              Daily care

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

              Aquarium position

              Where is the best place for your aquarium? What do you need to consider when choosing where to put it?

              Biotope (habitat) aquarium types

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              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®

              Lively goldfish in the aquarium enhance any room perfectly! Invite some new flatmates into your home with this goldfish aquarium.

              Aquascaping aquarium type JBL Dreamscape

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

              Customer reviews

              Reviews

              Overall rating: 4.3
              3 public review(s) for this product.

              0 Reviews

              3 more reviews in other languages

              3 Reviews in other languages

              A.Q.U.A.R.I.S.T.I.Komet - German
              2024-11-11T13:47:35Z

              Super Produkt!

              Man konnte super beobachten wie die Algen weniger wurden und das Problem behoben ist.

              Der Sicherheitshinweis ist ebenfalls super, da die Wasserorganismen wie man weiß wichtig sind und man dementsprechend sich super Vorbereiten kann und nachsorgen kann!

              A. Lübke - German
              2022-03-28T18:12:46Z

              Das Versprechen, dass dieses Mittel alle Arten von Algen zuverlässig bekämpft, erfüllt das Produkt leider nicht ein. Thorea hispida z.B. ist auch nach mehrmaliger Anwendung gänzlich unbeeindruckt und erfreut sich besten Wachstums. Bei den vorhandenen Grünalgen zeigte sich das Mittel wirkungsvoll. Anders als in den Hinweisen angegeben, gab es keinerlei Probleme mit meinen Amanogarnelen.

              Comment from JBL:

              Hallo Andrea, die von dir genannte Alge ist viel komplexer aufgebaut und benötigt daher mehrere Anwendungen. Bei einfachen Algen, wie z.B. Grünalgen, hat es bei dir bereits nach der ersten Anwendung wunderbar geklappt.

              Ragnarshrimps - French
              2021-11-09T15:33:35Z

              Produit efficace contre les algues, à utilisé le matin quand le ph est bas, attention ne pas utiliser dans un aquarium contenant des crevettes. Je recommande ce produit.

              JBL Algol - safety information in accordance with GHS

              Risk phrase

              H412: Harmful to aquatic life with long lasting effects.

              safety note

              P101: If medical advice is needed, have product container or label at hand.
              P102: Keep out of reach of children.
              P273: Avoid release to the environment.
              P501a: Dispose of contents/container in accordance with local regulations.
              Your opinion is important to us
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              Sustainability at JBL
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