Best Quart 400 2025

Advertising Disclosure

Last Updated - 26.07.2025

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

Show more
9.8

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.

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-116781
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 €
02

ABACUS

ABACUS® Facade Cleaner, Green Growth Remover for Facades, Plaster & House Walls - Automatically Removes Fungi, Lichen & Algae from Facades - Only 0.1 L per m², Nell Facade 10 Litres (7179)

Show more
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.

Show more
Main highlights

Works independently: simply apply the facade cleaner to the green coating on the facade. The facade cleaning is automatic. No pressure washer or scrubbing is necessary to remove algae, fungi and lichen from plaster or house wall.
Unique: Our facade cleaner has been specially developed to remove green growth such as fungi, lichens and algae from facades. The unique formula allows the facade cleaner to stick to plaster and house walls and allows a longer exposure time on the green coating.
Ready to use: the application of the facade cleaner is very easy and makes it the perfect green growth remover for facades. Simply apply the finished mixture to the plaster using a sprayer, brush or brush to remove fungi, lichen and algae from the house wall.
Proven quality: our facade cleaner automatically frees facades and house walls from green growth, algae, fungi and light lichen infestation.
Note: Nell Fassade is a biocidal product: use biocidal products carefully. Always read the label and product information before use. / Reg number: N-109496
Long-term effect: our facade cleaner penetrates into the capillaries of the facade and removes even deep-seated green growth from plaster and house wall. Since even the smallest micro-organisms are destroyed, the façade is protected in the long term against the re-infestation of fungi, lichens and algae.
Extremely powerful: the facade cleaner is a real powerhouse and removes even stubborn green growth from facades. Even mould, black algae, red algae and lichens are easily removed from the house wall by our facade cleaner.

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

Show more
9.5

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.

Show more
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 €
Value for Money

04

ABACUS

ABACUS® Extreme Stone Cleaner Intensive Stone Cleaner for Outdoor Use with Immediate Effect, Removes Dirt, Green Growth, Lichens and Algae in Minutes, Stone Cleaner Intensive Exterior 5 Litres

Show more
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.

Show more
Main highlights

Note: stone cleaner extreme is a biocide: use biocidal products carefully. Always read the label and product information before use. / Reg number: N-104852
Extremely versatile: the extreme stone cleaner removes not only algae, fungi and lichens from stones in an instant. When cleaning patio and paving stones, the powerful formula ensures that even dirt, mould stains and even mould are easily removed. What's special about our intensive cleaner? Despite its extreme power, it is gentle on stone surfaces. Whether natural stone, paving stone or concrete, our intensive cleaner removes dirt without damaging it.
Extremely sustainable: the deep effect of the stone cleaner extreme removes even the smallest micro-organisms and bacteria from the stone surface. As even the smallest remains of lichens and algae are removed during stone cleaning, paving stones and terraces are thus protected from re-infestation.
Extremely powerful: the unique formula of the stone cleaner extreme is extremely powerful and has been specially developed to remove even the most stubborn dirt such as green growth, algae, fungi and lichens from stones in no time at all without the need for a pressure washer. The outdoor stone cleaner is so intense that patios and paving stones are brightened again.
Extremely fast: our stone cleaner extreme has been specially developed for quick and immediate green growth removal. It destroys algae, fungi, lichens and dirt in no time. Ideal when visits are coming and paving stones or patios need to be spontaneously cleared of green growth. The dirt is completely removed and the surface shines like new.
Extremely easy to use: our stone cleaner extremely easy to use. Nothing more needs to be done than apply the stone cleaner undiluted to the dirty terrace or stone surface and massage it with a scrubber or brush - leave to work for a short time, rinse and you're done!

69,90 €
05

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

Show more
9.3

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.

Show more
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 €
06

Nanoprotect

Nanoprotect Green Growth Remover Concentrate | 2 x 1 kg for 400 m² | Algae Remover and Facade Cleaner | No Pressure Washer Required | Ideal for Paving Stones and Walkways

Show more
9.1

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.

Show more
Main highlights

The right product for every need: also available as 0.5 kg or 1 kg concentrate for up to 100 m² - 200 m² or as a 1 kg economy set including pressure sprayer. Deep disinfection of surfaces.
The cleaner works automatically without a pressure washer - no reworking and scrubbing necessary. Reduces the risk of accidents due to slippery surfaces. Ideal as a roof cleaner, patio cleaner, fungus remover and preventive against lichen formation.
The chemistry is right: Nanoprotect has been offering professional special products for the household, garden, car and boat sectors for more than 20 years. Quality – Made in Germany.
Quality that convinces: Intensive green growth cleaner and algae remover for stone, concrete, wood, plastic and textiles. Ideal for wall, wall, pavement, patio, tombstone, fence, roof or awning.
Box contents: 2 x 1 kg green growth remover liquid concentrate | For up to 400 m² | Paw friendly - after drying harmless to humans or animals | Free from chlorine and acids. Use disinfectant carefully. Always read the label and product information before use. BAuA-Reg. No: N-115658

39,90 €
07

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

Show more
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.

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-116781
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 €
08

Terra Domi

TerraDomi Nevergreen Concentrate 1:60 for up to 3000 m² Roof Cleaner Green Remover Moss Remover Cleaning Agent Stone Cleaner

Show more
8.8

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.

Show more
Main highlights

Very productive due to mixing ratio of 1:10 - 1:50, depending on the degree of soiling of the surfaces to be treated.
The original from TerraDomi: Nevergreen is the universal disinfectant cleaner for a perfect home and garden – your paths, reed roofs, pebbles, tiles and stone slabs have never been so clean.
Long-lasting effect for a beautiful home: The stone cleaner keeps your paving stones, walkways, reed roofs and places permanently free from annoying greenery and moss for approximately 1 year and ensures effective cleaning.
Directions for use: The care product cleans surfaces made of stone easily and with little effort. Simply apply with watering can or pressure nozzle from approx. 30 cm and leave to work for 3 - 4 hours.
Box contents: 1 x Nevergreen original from Terra Domi.

36,95 €
09

PROCREA

PROCREA® Premium Green Growth Remover "Grünbelag Ex" [For up to 400 m²] Highly Effective Professional Concentrate for Verdigris, Stone, Wood, Moss, Lichens, Fabric and Much More – 20 times Reinforced

Show more
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.

Show more
Main highlights

Self-acting – no scrubbing required. Ideal for a wide range of outdoor applications such as patios, roofs, facades, awnings and much more.
Professional – the surface must be dry and remain rain-free for 24 hours. Rain delays the effect. In case of severe infestation, reapply after a few days.
Guaranteed quality – no ifs and buts. Our promise: If something is wrong with our product, you will receive your money back within a short time - order now!
Extra gentle – the green growth remover has a biological basis, is safe for humans and animals and is therefore still gentle on the surface. No risk of slipping after application
Effective cleaning – remove verdigris without pressure washer and scrubbing – with this green growth remover concentrate, green algae disappear after a few days, black algae within a year.

12,90 €
10

Nanoprotect

Nanoprotect Stone Cleaner Concentrate | 5 kg Including Pressure Sprayer | For Approx. 500 m² | Intensive Cleaner for Outdoor Plants | Ideal for Home, Yard and Garden

Show more
8.6

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.

Show more
Main highlights

The chemistry is right: Nanoprotect has been offering professional special products for the household, garden, car and boat sectors for more than 20 years. Quality – Made in Germany.
Quality that convinces: The high-performance concentrate for deep cleaning and care of all washable surfaces reliably removes greasy dirt, environmental dirt or soot deposits.
Nanoprotect Stone cleaner is not suitable for removing green growth, algae or lichen. For these purposes, we recommend Nanoprotect green growth remover. After successful cleaning, the Nanoprotect stone impregnation can be applied as preventive protection.
Easy to use: the concentrate, which can be diluted 1:8 or 1:5 with water, guarantees reliable clean paths, facades, pebbles, tiles, stone slabs, paving stones or pavements. The right product for every need: also available as a single product, double pack or 5 kg canister.
Box contents: 5 kg stone cleaner concentrate including pressure sprayer. For approx. 500 m². Harmless to plants and animals. Also works on wood, plastic or textiles.

48,90 €