Best Ago Quart 400 2025

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Last Updated - 09/06/2025

Best Choice

01

ABACUS

ABACUS® Nell Ultra Green Growth Remover & Algae Remover Concentrate, Extremely Strong! Removes Green Growth & Algae Automatically with Long-Term Protection - for Stone, Facade, Patio, Roof - Nell

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9.7

Exceptional

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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Main highlights

AUTOMATIC CLEANING: The Nell Ultra green growth remover & algae remover removes the green coating by itself and is extremely effective - you can sit back and relax while it does the work. The automatic action of the green growth remover frees patios, walkways and other surfaces from unsightly green deposits without tedious scrubbing and cleaning.
Very high yield: the Nell Ultra green growth remover has one of the highest active ingredient content on the market with 40% active ingredient. This makes our green growth remover not only extremely effective, but also very economical - with one litre of our algae remover, up to 100 m² of area of algae and green growth can be freed. This exceptionally high efficiency protects the environment and your wallet without compromising on quality.
Versatile effective: our green growth and algae remover is a real all-rounder and can be used on all waterproof surfaces. It is the perfect helper for outdoor use and is ideal for removing green growth on patios, pavements, stones, facades, plaster, walls, gravestones, roofs, fences, awnings, WPC and much more.
Proven premium quality: our green growth remover has been removing algae and green growth throughout Germany for over 30 years and has proven itself - more than 2 million bottles sold speak for themselves. The combination of carefully selected ingredients and an exceptionally high active ingredient content ensure the effective and automatic removal of algae, green growth, lichens and fungi that Nell Ultra is known for.
Officially registered: Nell Ultra green growth and algae remover is a biocide: use biocidal products carefully. Always read the label and product information before use. / Reg number: N-111940
Long-term protection with deep effect: our green growth remover offers the self-acting effect as well as the proven long-term protection. The special formula penetrates into the capillaries and removes even the smallest residues of algae, lichens and fungi. This means that surfaces treated with Nell Ultra remain protected from new infestations for up to 12 months - not only looks beautiful, but also saves time and money.
In harmony with the environment: the Nell Ultra green growth remover and algae remover meets even the highest quality standards thanks to its sustainability. Since the environment is important to us, we have developed a green growth remover that is chlorine-free, acid-free and contains no animal ingredients. The selected ingredients can also be completely biodegradable and are safe for humans and animals.

84,90 €
Value for Money

02

ABACUS

ABACUS® Nell Ultra® Green Growth Remover 4L + Stone Cleaner Extreme 2L Removes Green Growth & Algae with Long-Term Protection in Minutes! Algae Remover Fungus Remover Lichen Remover Algaecide Algae

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9.6

Exceptional

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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Main highlights

AUTOMATIC CLEANING: The Nell Ultra green growth remover & algae remover removes the green coating by itself and is extremely effective - you can sit back and relax while it does the work. The automatic action of the green growth remover frees patios, walkways and other surfaces from unsightly green deposits without tedious scrubbing and cleaning.
Very high yield: the Nell Ultra green growth remover has one of the highest active ingredient content on the market with 40% active ingredient. This makes our green growth remover not only extremely effective, but also very economical - with one litre of our algae remover, up to 100 m² of area of algae and green growth can be freed. This exceptionally high efficiency protects the environment and your wallet without compromising on quality.
Versatile effective: our green growth and algae remover is a real all-rounder and can be used on all waterproof surfaces. It is the perfect helper for outdoor use and is ideal for removing green growth on patios, pavements, stones, facades, plaster, walls, gravestones, roofs, fences, awnings, WPC and much more.
Proven premium quality: our green growth remover has been removing algae and green growth throughout Germany for over 30 years and has proven itself - more than 2 million bottles sold speak for themselves. The combination of carefully selected ingredients and an exceptionally high active ingredient content ensure the effective and automatic removal of algae, green growth, lichens and fungi that Nell Ultra is known for.
Officially registered: Nell Ultra green growth and algae remover and stone cleaner extreme are biocides: use biocidal products carefully. Always read the label and product information before use. / Nell Ultra Reg-No: N-111940 / Stone Cleaner Extreme Reg No: N-104852
Long-term protection with deep effect: our green growth remover offers the self-acting effect as well as the proven long-term protection. The special formula penetrates into the capillaries and removes even the smallest residues of algae, lichens and fungi. This means that surfaces treated with Nell Ultra remain protected from new infestations for up to 12 months - not only looks beautiful, but also saves time and money.
Extremely powerful: the unique formula of the stone cleaner extreme is extremely powerful and removes green growth such as algae from stones in no time at all without the need for a pressure washer. Even the most stubborn green growth such as lichens effortlessly removed from patios and paving stones thanks to the immediate effect.

79,90 €
03

Ago

AGO® Quart Green Plaque Remover for Façade Wood, Plastic Roof Tiles, Stone, Plaster, Awning, Concrete, and Much More, Chlorine and Acid-Free, Lichen and Algae Remover Concentrate

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9.4

Excellent

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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Main highlights

Safety - Lichen Remover & Natural Stone Cleaner: Use biocidal products with care. Read the label and product information before using the patio and façade cleaner. BAuA N-72912.
Practical algae and lichen remover: Our algae remover concentrate is biologically based, completely gentle on the surface and can be used on all waterproof surfaces.
Long-lasting effect: The highly effective surface cleaner contains an active ingredient that, once applied for 15-18 months, is slightly disinfectant and kills micro-organisms.
Effective green remover: entirely without the need for high-pressure cleaners - no more scrubbing and rinsing. Green algae disappears after a few days, black algae gradually over the course of one year.
Economical Green Plaque Remover for Wood etc.: 1 x litre of Ago Quart algae and green plaque remover makes 20 x litres of ready-to-use solution.

59,90 €
04

ABACUS

ABACUS® Nell Ultra Green Growth Remover & Algae Remover Concentrate, Extremely Strong! Removes Green Growth & Algae Automatically with Long-Term Protection - for Stone, Facade, Patio, Roof - Nell

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9.2

Excellent

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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Main highlights

AUTOMATIC CLEANING: The Nell Ultra green growth remover & algae remover removes the green coating by itself and is extremely effective - you can sit back and relax while it does the work. The automatic action of the green growth remover frees patios, walkways and other surfaces from unsightly green deposits without tedious scrubbing and cleaning.
Very high yield: the Nell Ultra green growth remover has one of the highest active ingredient content on the market with 40% active ingredient. This makes our green growth remover not only extremely effective, but also very economical - with one litre of our algae remover, up to 100 m² of area of algae and green growth can be freed. This exceptionally high efficiency protects the environment and your wallet without compromising on quality.
Versatile effective: our green growth and algae remover is a real all-rounder and can be used on all waterproof surfaces. It is the perfect helper for outdoor use and is ideal for removing green growth on patios, pavements, stones, facades, plaster, walls, gravestones, roofs, fences, awnings, WPC and much more.
Proven premium quality: our green growth remover has been removing algae and green growth throughout Germany for over 30 years and has proven itself - more than 2 million bottles sold speak for themselves. The combination of carefully selected ingredients and an exceptionally high active ingredient content ensure the effective and automatic removal of algae, green growth, lichens and fungi that Nell Ultra is known for.
Officially registered: Nell Ultra green growth and algae remover is a biocide: use biocidal products carefully. Always read the label and product information before use. / Reg number: N-111940
Long-term protection with deep effect: our green growth remover offers the self-acting effect as well as the proven long-term protection. The special formula penetrates into the capillaries and removes even the smallest residues of algae, lichens and fungi. This means that surfaces treated with Nell Ultra remain protected from new infestations for up to 12 months - not only looks beautiful, but also saves time and money.
In harmony with the environment: the Nell Ultra green growth remover and algae remover meets even the highest quality standards thanks to its sustainability. Since the environment is important to us, we have developed a green growth remover that is chlorine-free, acid-free and contains no animal ingredients. The selected ingredients can also be completely biodegradable and are safe for humans and animals.

54,90 €
05

HG

HG Algae and Green Growth Remover Concentrate 5 Litres, Green Growth Remover Against Algae and Moss on Patios, Paths, Walls, Roofs, Wood, Tombstones and More, Long-lasting, Economical Consumption

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9.0

Excellent

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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Main highlights

Versatile: HG green growth remover removes algae on patios, paths, walls, roofs, wooden sleepers, terracotta pots, gravestones, gravestones and more
Highly effective and fast: after applying the HG algae and green growth remover, the algae disappear within 36 hours
Harmless: Of course, our moss remover and algae remover in diluted form does not pose a danger to grass and plants
Economical to use: mix with water in a ratio of 1:20. Our moss remover is sufficient for up to 1,000 m²
Easy to use: mix HG green growth remover concentrate in a ratio of 1:20 with water. Apply the solution to the affected surfaces with a watering can or plant sprayer

34,99 €
06

ABACUS

ABACUS® Nell Ultra Green Growth & Algae Remover Concentrate, Extremely Strong Automatically Removes Green Growth and Algae with Long-Term Protection - for Stone, Facade, Patio, Roof - Nell Ultra, 4 x

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8.9

Very Good

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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Main highlights

Very high yield: At 40%, the Nell Ultra Green Growth Remover has one of the highest active ingredients on the market. This makes our green growth remover not only extremely effective, but also very economical - with one litre of our algae remover, up to 100 m² of area of algae and green growth can be freed. This exceptionally high efficiency protects the environment and your wallet without compromising on quality.
Proven premium quality: Our green growth remover has been removing algae and green growth throughout Germany for over 30 years and has proven itself - more than 2 million bottles sold speak for themselves. The combination of carefully selected ingredients and an exceptionally high active ingredient content ensure the effective and automatic removal of algae, green growth, lichens and fungi that Nell Ultra is known for.
Officially registered: Nell Ultra Green Growth & Algae Remover is a biocide: Use biocidal products with care. Always read the label and product information before use (English language not guaranteed). Reg. no: N-96059.
Long-term protection with deep effect: In addition to the automatic effect, our green growth remover also offers proven long-term protection. The special formula penetrates into the capillaries and removes even the smallest residues of algae, lichens and fungi. This means that surfaces treated with Nell Ultra are protected from new infestations for up to 12 months - not only looks beautiful, also saves time and money.
In harmony with the environment: The Nell Ultra green growth remover and algae remover meets even the highest quality standards thanks to its sustainability. Since the environment is important to us, we have developed a green growth remover that is chlorine-free, acid-free and contains no animal ingredients. The selected ingredients can also be completely biodegradable and are safe for humans and animals.
Automatic cleaning: The Nell Ultra Green Growth Remover & Algae Remover removes the green plaque on its own and is extremely effective - you can sit back and relax while it does the job. The automatic action of the green growth remover frees patios, walkways and other surfaces from unsightly green deposits without tedious scrubbing and cleaning.
All-round effective: Our green growth and algae remover is a real all-rounder and can be used on all waterproof surfaces. It is the perfect helper for outdoor use and is ideal for removing green growth on patios, pavements, stones, facades, plaster, walls, gravestones, roofs, fences, awnings, WPC and much more.

69,90 €
07

Roundup

Roundup Express Weed-Free Ready Mix for Combating Weeds and Grasses, 5 Litre Canister

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29% Off
8.7

Very Good

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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Main highlights

Works even at low temperatures over the leaf of the plants – without glyphosate.
Quickly and effectively combats annual dicotyledonous weeds and weeds.
Not dangerous to bees and biodegradable: the active ingredient is decomposed in the soil by micro-organisms.
Non-bee-hazardous, ready-to-use contact herbicide with fast, visible effect after 1 hour.
For weed control under ornamental and fruit trees as well as on paths and places with woody plants in the garden area (does not apply to sealed areas).
Contains reaction compound of 5-chloro-2-methyl-2H-isothiazol-3-one and 2-methyl2H-isothiazol-3-one (3:1). May cause allergic reactions.
As it only works on green, non-woody plants and plant parts, weeds can be controlled under trees and shrubs.
Approval number: 00A106-00, Use plant protection products carefully. Always read the label and product information before use. Please refer to the warnings and safety advice in the user manual. Use by non-professional users permitted.

31,70 € 44,99 €(29% Off off)
08

A.K.B.

A.K.B. 1000 m² 5 Litre High Concentrate, Green Growth Remover, Facade Cleaner, Algae Remover

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8.4

Good

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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Main highlights

No chlorine or acid. Therefore, material and environmentally friendly. Can be used on most surfaces
Quick automatic cleaning effect for green growth
Made in Germany and registered product under BAuA N-11572, use biocidal products carefully. Always read the label and product information before use.
Ideal for paving stones, roof tiles, glass and much more.
Chlorine and acid free, free from iron compounds. Also ideal as long-term protection after cleaning work with the pressure washer, so that the pressure washer insert is no longer required in the future
Algae, fungi, lichens disappear over weeks/months (see table below)

69,90 €
09

ABACUS

ABACUS® Nell Ultra Green Growth Remover & Algae Remover Concentrate, Extremely Strong! Removes Green Growth & Algae Automatically with Long-Term Protection - for Stone, Facade, Patio, Roof - Nell

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8.2

Good

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

Show more
Main highlights

AUTOMATIC CLEANING: The Nell Ultra green growth remover & algae remover removes the green coating by itself and is extremely effective - you can sit back and relax while it does the work. The automatic action of the green growth remover frees patios, walkways and other surfaces from unsightly green deposits without tedious scrubbing and cleaning.
Very high yield: the Nell Ultra green growth remover has one of the highest active ingredient content on the market with 40% active ingredient. This makes our green growth remover not only extremely effective, but also very economical - with one litre of our algae remover, up to 100 m² of area of algae and green growth can be freed. This exceptionally high efficiency protects the environment and your wallet without compromising on quality.
Versatile effective: our green growth and algae remover is a real all-rounder and can be used on all waterproof surfaces. It is the perfect helper for outdoor use and is ideal for removing green growth on patios, pavements, stones, facades, plaster, walls, gravestones, roofs, fences, awnings, WPC and much more.
Proven premium quality: our green growth remover has been removing algae and green growth throughout Germany for over 30 years and has proven itself - more than 2 million bottles sold speak for themselves. The combination of carefully selected ingredients and an exceptionally high active ingredient content ensure the effective and automatic removal of algae, green growth, lichens and fungi that Nell Ultra is known for.
Officially registered: Nell Ultra green growth and algae remover is a biocide: use biocidal products carefully. Always read the label and product information before use. / Reg number: N-111940
Long-term protection with deep effect: our green growth remover offers the self-acting effect as well as the proven long-term protection. The special formula penetrates into the capillaries and removes even the smallest residues of algae, lichens and fungi. This means that surfaces treated with Nell Ultra remain protected from new infestations for up to 12 months - not only looks beautiful, but also saves time and money.
In harmony with the environment: the Nell Ultra green growth remover and algae remover meets even the highest quality standards thanks to its sustainability. Since the environment is important to us, we have developed a green growth remover that is chlorine-free, acid-free and contains no animal ingredients. The selected ingredients can also be completely biodegradable and are safe for humans and animals.

29,90 €
10

ABACUS

ABACUS® Nell Ultra Green Growth Remover & Algae Remover Set, Extremely Strong! Removes Green Growth & Algae Automatically with Long-Term Protection - Algae & Green Growth Remover 1000 ml with Spray

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8.1

Good

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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Main highlights

AUTOMATIC CLEANING: The Nell Ultra green growth remover & algae remover removes the green coating by itself and is extremely effective - you can sit back and relax while it does the work. The automatic action of the green growth remover frees patios, walkways and other surfaces from unsightly green deposits without tedious scrubbing and cleaning.
Very high yield: the Nell Ultra green growth remover has one of the highest active ingredient content on the market with 40% active ingredient. This makes our green growth remover not only extremely effective, but also very economical - with one litre of our algae remover, up to 100 m² of area of algae and green growth can be freed. This exceptionally high efficiency protects the environment and your wallet without compromising on quality.
Versatile effective: our green growth and algae remover is a real all-rounder and can be used on all waterproof surfaces. It is the perfect helper for outdoor use and is ideal for removing green growth on patios, pavements, stones, facades, plaster, walls, gravestones, roofs, fences, awnings, WPC and much more.
Proven premium quality: our green growth remover has been removing algae and green growth throughout Germany for over 30 years and has proven itself - more than 2 million bottles sold speak for themselves. The combination of carefully selected ingredients and an exceptionally high active ingredient content ensure the effective and automatic removal of algae, green growth, lichens and fungi that Nell Ultra is known for.
Officially registered: Nell Ultra green growth and algae remover is a biocide: use biocidal products carefully. Always read the label and product information before use. / Reg number: N-111940
Long-term protection with deep effect: our green growth remover offers the self-acting effect as well as the proven long-term protection. The special formula penetrates into the capillaries and removes even the smallest residues of algae, lichens and fungi. This means that surfaces treated with Nell Ultra remain protected from new infestations for up to 12 months - not only looks beautiful, but also saves time and money.
In harmony with the environment: the Nell Ultra green growth remover and algae remover meets even the highest quality standards thanks to its sustainability. Since the environment is important to us, we have developed a green growth remover that is chlorine-free, acid-free and contains no animal ingredients. The selected ingredients can also be completely biodegradable and are safe for humans and animals.

39,90 €