JBL AlgoPond Forte
Algaecide to combat all types of algae in garden ponds

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-37641
  • To combat all types of algae in garden ponds quickly and effectively
  • Easy to use: determine the required quantity, mix it with pond water in a watering can, pour it evenly over the surface of the pond
  • Quick treatment against green water and thread algae by affecting the algae’s metabolism
  • Copper-free. Harmless for fish and plants
  • Package contents: bottle with dosing cup as lid, or canister. Dosage: 50 ml per approx. 1000 l pond water
Find out more
Price: 16,35 €
basic price 65.4 EUR / l
Recommended retail price incl. VAT
You can find this item in your specialist and online shop
Price: 23,44 €
basic price 46.88 EUR / l
Recommended retail price incl. VAT
You can find this item in your specialist and online shop
Price: 78,49 €
basic price 31.4 EUR / l
Recommended retail price incl. VAT
You can find this item in your specialist and online shop
Price: 112,90 €
basic price 22.58 EUR / l
Recommended retail price incl. VAT
You can find this item in your specialist and online shop
Product information

Against algae in the garden pond
AlgoPond Forte combats all kinds of algae (green water and thread algae) highly effectively by systematically affecting the algae’s metabolism.

JBL’s zero-risk concept
Algae can pollute the pond water and thus cause damage to the fish and the plants in the pond. In collaboration with scientists JBL has developed a concept for a permanent removal of algae.

“1-2-3 algae-free”
Stabilise the water: increase the mineral content for anti-algae agents (JBL StabiloPond) to work more effectively
Combat algae: add a suitable anti-algae agent (JBL AlgoPond) into the water
Limit nutrients: remove the nutrients of dying algae (JBL PhosExPond)

Easy use of AlgoPond Forte
Always use it in the morning. Determine the required quantity for the garden pond. Mix the calculated quantity with pond water in a watering can and spread it evenly over the pond. Don’t filter through activated carbon. Switch off any UVC devices for a week After use do not bathe in swimming ponds for 5 days.

Dosage: 50 ml per approx. 1000 l pond water.

Videos
Details

JBL AlgoPond Forte 250 ml

Art. no.:
2740500
EAN Code:
4014162274052
Content:
0,25 l
Range:
5000 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: Goldfish, Juvenile fish, Koi, Sturgeons, Veiltails
Animal size: For all animal sizes
Animal age group: All garden pond animals
Volume habitat: > 5,000 L
Material: 3- (4-CHLOROPHENYL) -1-METHOXY-1-METHYLUREA, sodium salt of carboxymethyl cellulose, purified water
Colour: white / transparent
Dosage: 50 ml per 1000 l pond water
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

JBL AlgoPond Forte 500 ml

Art. no.:
2740600
EAN Code:
4014162274069
Content:
0,5 l
Range:
10000 l
Volume packaging:
0.85 l
Gross weight:
578.7 g
Net weight:
502 g
Weight factor:
1000
Packaging dimensions (l/h/w):
40/220/97 mm

Properties

Animal species: Goldfish, Juvenile fish, Koi, Sturgeons, Veiltails
Animal size: For all animal sizes
Animal age group: All garden pond animals
Volume habitat: > 10,000 L
Material: 3- (4-CHLOROPHENYL) -1-METHOXY-1-METHYLUREA, sodium salt of carboxymethyl cellulose, purified water
Colour: white / transparent
Dosage: 50 ml per 1000 l pond water

Electronic label / illuminant

Mercury: No
Dimmable: No

JBL AlgoPond Forte 2,5 l

Art. no.:
2740700
EAN Code:
4014162274076
Content:
2,5 l
Range:
50000 l
Volume packaging:
3.36 l
Gross weight:
2650 g
Net weight:
2500 g
Weight factor:
1000
Packaging dimensions (l/h/w):
150/195/115 mm

Properties

Animal species: Goldfish, Juvenile fish, Koi, Sturgeons, Veiltails
Animal size: For all animal sizes
Animal age group: All garden pond animals
Volume habitat: > 50,000 L
Material: 3- (4-CHLOROPHENYL) -1-METHOXY-1-METHYLUREA, sodium salt of carboxymethyl cellulose, purified water
Colour: white / transparent
Dosage: 50 ml per 1000 l pond water
Transport conditions: For this type of product we recommend transport and storage at room temperature.

Electronic label / illuminant

Mercury: No
Dimmable: No

JBL AlgoPond Forte 5 l

Art. no.:
2740800
EAN Code:
4014162274083
Content:
5 l
Range:
100000 l
Volume packaging:
6.34 l
Gross weight:
5250 g
Net weight:
5010 g
Weight factor:
1000
Packaging dimensions (l/h/w):
190/230/145 mm

Properties

Animal species: Goldfish, Juvenile fish, Koi, Sturgeons, Veiltails
Animal size: For all animal sizes
Animal age group: All garden pond animals
Volume habitat: > 100,000 L
Material: 3- (4-CHLOROPHENYL) -1-METHOXY-1-METHYLUREA, sodium salt of carboxymethyl cellulose, purified water
Colour: white / transparent
Dosage: 50 ml per 1000 l pond water
Transport conditions: For this type of product we recommend transport and storage at room temperature.

Electronic label / illuminant

Mercury: No
Dimmable: No
FAQ
Can I use several anti-algae agents together in the pond?

Each JBL anti-algae agent has a special purpose. It is therefore not necessary to use several AlgoPond products at the same time. Use AlgoPond Green to combat green water. Use AlgoPond forte for thread algae and all other types of algae. If you want to change the product, allow a time interval of 14 days, a water change of at least 50 % and filtering via activated carbon. The products StabiloPond and PhosEx may, of course, be used together with an AlgoPond algae agent according to the 1-2-3 algae-free principle.

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 AlgoPond Forte safe for fish?

With proper dosage and application JBL AlgoPond Forte is safe for fish.

Why should JBL AlgoPond Forte be used in the mornings?

During the day the pH value increases to potentially very high values, especially when there is an algae plague. With high pH values the effectiveness of JBL AlgoPond Forte is reduced. It is therefore important to stabilize the water in the evening as required, and then to carry out an algae treatment in the morning, when the pH value is reduced.

In the instructions of JBL AlgoPond Forte it says that UV-C devices should be switched off for a week. Is it one week before or after use?

The UV-C devices should be switched off for a week, starting at the beginning of the treatment (the addition of JBL AlgoPond Forte).

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

#jbldeal – Now you can benefit!

As a member of the myJBL community you have exclusive access to special promotions. We have attractive benefits and offers for you. Don’t miss out!

Find out more

Solves algae problems in the pond - JBL AlgoPond Forte combats all types of algae in the garden pond

With this anti-algae agent you can quickly and effectively combat all types of algae in your garden pond.

Find out more

The cold weather’s here: get your pond ready

Here you’ll find everything you’ll need to know to keep your fish healthy during the winter and to give them a good start into the next season.

Find out more

Preparations for the autumn - algae prevention

If you take proper action now, by reducing the nutrient input and the existing nutrient sources, you can prevent algae problems in the coming year.

Find out more

I’ve had enough of this pond! Give up or save it?

Maybe you’ve felt like this: nothing works, the pond looks disastrous and you just don’t know what to do.

Find out more

My pond is losing water - where has it gone?

Die Sonne knallt auf den Teich und Sie füllen täglich Wasser nach? An manchen Tagen fragt man sich, „ist das wirklich normal und nur die Verdunstung“?

Find out more

Pond guide: you ask, we answer!

Ask us your technical question and we’ll answer your question in the comments with our team of experts.

Find out more

Liquid sun protection for your pond prevents algae

Is your pond clear – with no algae in sight? Perhaps you were just lucky or you have completed an algae treatment successfully. In either case there’s one thing you don’t need: algae!

Find out more

ProPond: What pond care do you really need and what really works?

A lot of pond owners neglect their regular maintenance and only react when problems occur and it’s often too late.

Find out more

Pollen, The Algae Motor In The Pond

The car roofs are yellow, the windows dusty and on the water surface floats a yellow-green film of flower pollen and insects. Take immediate action, using preventive or immediate measures to make sure it won’t lead to problems.

Find out more

Algae Control 1-2-3 algae free

A few algae in the pond do not pose a problem and even form a component of a healthy pond. But once the water turns green or „blanket weed“ algae become rampant, you then have a problem which needs fixing. Effective and longterm algae control consists of three steps.

Find out more

Let’s Clear This Up: Cloudy Water in the Pond

Clear water is right at the top of almost all pond owners’ wish list.

Find out more

Algae in the Pond – An Outline

It can affect every pond owner. But if you are careful you can avert problems before they occur. In the following article we would like to introduce you to the different types of algae you may meet in the garden pond:

Find out more

Algae carpets on the water surface: act now!

We are constantly being asked by pond owners for advice about how to deal with the problem of algae carpets on the water surface.

Find out more

An anti-algae agent alone is no solution

Everyone knows this scenario. Just last week the pond was alright, then suddenly the algae came overnight. Why does this happen? It’s really very simple. You only have to keep in mind 2 factors.

Find out more
Press

28.12.2018

JBL AlgoPond Direct to be replaced by JBL AlgoPond Forte

For EU legal reasons, JBL has decided to discontinue its production of JBL AlgoPond Direct. Fortunately, JBL has a second algae product in its range to take its place without any drawbacks:

Find out more

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

21.04.2015

80 % of All Pond Owners Wrongly Estimated Their Water Volume

On a daily basis the JBL service department receives questions and inquiries on pond problems which it gladly answers in a competent manner. Now the online pond laboratory where pond owners can get help ...

Find out more

19.08.2013

1-2-3-algenfrei: Tipp der Woche

Eine wiederkehrende Frage: In meinem Teich gibt es keine Algen, aber das Wasser ist grün.

Find out more

11.08.2013

Direkt nach der Dosierung eines Algenmittels JBL PhosEx Pond Direct einsetzen ?

Kann ich direkt nach der Dosierung eines Algenmittels auch JBL PhosEx Pond Direct einsetzen ? Nein, das ist nicht sinnvoll, denn ...

Find out more

17.07.2013

Algen und Phosphat - gibt es da wirklich einen Zusammenhang ?

Bei der Gartenteichpflege wird immer auf die Begrenzung (Limitierung) des Phosphatgehaltes hingewiesen. Ist es wirklich so, dass Algen soviel Phosphate speichern können. Ein einfacher Versuch zeigt den Zusammenhang.

Find out more

14.07.2013

Das JBL Teichlabor: Voll normal ! - Fortsetzung

Eine Analyse der Daten zu Teichen, die an uns in der individuellen Beratung herangetragen werden, ergibt interessante Ergebnisse.

Find out more

12.07.2013

Das JBL Teichlabor: Voll normal !

Das JBL Teichlabor ist nun bereits seit 3 Jahren online und hat vielen hundert Teichbesitzern bei der Pflege ihres Teiches geholfen. Was geschieht im Hintergrund ?

Find out more

10.06.2013

1-2-3-algenfrei: Tipp der Woche

Wie behandelt man am besten Schwebe- oder Fadenalgen nach dem 1-2-3-algenfrei System von JBL ?

Find out more

07.06.2013

Schwebealgen im Gartenteich mit JBL AquaCristal UV-C behandeln

Es gibt zwei Möglichkeiten, Schwebealgen im Gartenteich zu behandeln. Chemisch oder physikalisch.

Find out more

28.08.2012

Green sludge or a slough of bacteria

Es hat sich herumgesprochen, dass UV-C Wasserklärer garantiert Schwebealgen abtöten und damit die grüne Wasserfärbung von Teich- als auch Aquarienwasser beseitigen. Ebenfalls ist bekannt, dass UV-C Strahlung die Keimdichten senkt, die ...

Find out more

21.09.2011

Treatment of green water in garden ponds

Das Jahr 2011 ist ein außergewöhnliches Jahr für Gartenteiche. Einem sehr warmen, trockenen Frühjahr (April und Mai) mit sehr viel Polleneintrag in die Gewässer folgte ein durchschnittlicher Juni sowie zwei niederschlagsreichere Monate Juli und August.

Find out more

13.07.2011

Green ponds: Worse than in recent years!

Due to the unique conditions this year (a warm, very humid spring, heavy pollen fall), we have a special situation in many ponds with floating algae growth that is so strong that "normal" doses of algaecides are sometimes not enough.

Find out more
Laboratories and calculators

Pond laboratory / calculator

This worldwide unique pond laboratory gives you dedicated support to combat problems with algae and cloudiness in your pond.

Pond Guarantee

JBL guarantees you a pond without algae problems if you follow our 3 steps. If by any chance the algae have not disappeared by the end of step 3, please contact the JBL Online Pond Laboratory directly. There you will receive comprehensive online advice. In the unlikely event of your algae problems not being solved, despite your consultation with us, you will be refunded with the purchase price of all JBL 1-2-3 algae-free products purchased during the current calendar year.
Reference guide (Themeworld)

1-2-3 algae-free concept

Sooner or later every pond owner has to deal with the algae issue. Sometimes I’s the first time they’ve had to think about it and sometimes they have tried out various methods and treatments – unfortunately without any long term success. JBL has put scientists to work on that problem and they have worked out a concept which will guarantee success.

Combating algae

Do you have green water or thread algae? We’ll give you long term solutions for algae problems

UV-C water clarifier

How to clean green water and bacterial cloudiness with an UV-C water clarifier

Algae species

Do you have green water or thread algae? We’ll give you long term solutions for algae problems

Water cloudiness

Is your water crystal-clear? How cloudiness is caused and how you can remove it.
Download

Instructions

Additional product information and downloads

safety instructions

Customer reviews

Reviews

Overall rating: 4.5
2 public review(s) for this product.

0 Reviews

2 more reviews in other languages

2 Reviews in other languages

ShakaAnimalStudio - German
2023-11-16T15:40:44Z

Leider hat auch uns die Algenplage erwischt, aber dank diesem Mittel konnten wir es wieder schnell in den Griff bekommen, Danke! Ab sofort werde ich immer eines zuhause haben um schnell eingreifen zu können.


123225477 - Portuguese
2023-05-03T17:49:27Z

Produto muito bom para controlar as algas sem prejudicar a saúde dos peixes e de outras plantas de lago.


JBL AlgoPond Forte - 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.
P103: Read carefully and follow all instructions.
P273: Avoid release to the environment.
P501a: Dispose of contents/container in accordance with local regulations.

A word about cookies before we continue

The JBL Homepage also uses several types of cookies to provide you with full functionality and many services: We require technical and functional cookies to ensure that everything works when you visit this website. We also use cookies for marketing purposes. This ensures that we recognise you when you visit our extensive site again, that we can measure the success of our campaigns and that the personalisation cookies allow us to address you individually and directly, adapted to your needs - even outside our website. You can determine at any time - even at a later date - which cookies you allow and which you do not allow (more on this under "Change settings").

The JBL website uses several types of cookies to provide you with full functionality and many services: Technical and functional cookies are absolutely necessary so that everything works when you visit this website. In addition, we use cookies for marketing purposes. You can determine at any time - even at a later date - which cookies you allow and which you do not (more on this under "Change settings").

Our data protection declaration tells you how we process personal data and what purposes we use the data processing for. tells you how we process personal data and what purposes we use the data processing for. Please confirm the use of all cookies by clicking "Accept" - and you're on your way.

Are you over 16 years old? Then confirm the use of all cookies with "Noticed" and you are ready to go.

Choose your cookie settings

Technical and functional cookies, so that everything works when you visit our website.
Marketing cookies, so that we recognize you on our pages and can measure the success of our campaigns.

PUSH messages from JBL

What are PUSH messages? As part of the W3C standard, web notifications define an API for end-user notifications that are sent to the user's desktop and/or mobile devices via the browser. Notifications appear on the end devices as they are familiar to the end user from apps installed on the device (e.g. emails). Notifications appear on the end user’s device, just like an app (e.g. for emails) installed on the device.

These notifications enable a website operator to contact its users whenever they have a browser open - it doesn’t matter whether the user is currently visiting the website or not.

To be able to send web push notifications, all you need is a website with a web push code installed. This allows brands without apps to take advantage of many of the benefits of push notifications (personalised real-time communications at just the right moment).

Web notifications are part of the W3C standard and define an API for end user notifications. A notification makes it possible to inform the user about an event, such as a new blog post, outside the context of a website.

JBL GmbH & Co. KG provides this service free of charge, and it is easy to activate or deactivate.