Best Uv Klärer Test 2025

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Last Updated - 26.07.2025

Best Choice

01

T.I.P.

T.I.P. 30447 Stainless Steel UV-C Spotlight for Pools and Ponds up to 36,000 L - 36 Watt for Bacteria and Algae Reduction - with LED Function Control SPU 36000 UV

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12% Off
9.8

Exceptional

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Main highlights

Versatile connectivity: Included accessories ensure easy installation and adaptation to different filter systems for flexible use.
INSTANT CONTROL The built-in LED light allows for quick checking of the spotlight function so you can always use the full power.
HEAVY DUTY CONSTRUCTION Made of durable stainless steel, ensuring reliable performance with long-term use in the pool filter circuit.
Energy-efficient function: with 36 watts of power, the spotlight ensures optimal efficiency with low power consumption and is ideal for pools up to 36,000 litres.
EFFECTIVE GERM REDUCTION Our UV-C spotlight reduces bacterial stress and minimizes algae growth for clean pool water.

113,89 € 129,95 €(12% Off off)
Value for Money

02

SunSun

SunSun CUV 236 36 W Pond Clarifier

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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

Protects your fish from disease-spreading germs, safe and good for fish and plants
Maximum flow rate. 6000 L/H for a pressure of maximum. 0.3 bar.
Keeps water clear and cleans pond water without the addition of chemicals.
Keeps algae, bacteria and mould build-up under control
36 W UV output for max.45 m³ pond size, hose 19 to 32 mm, 5 m cable

93,99 €
03

Ecomax

EcoMax 10000 UVC clarifier, 11W

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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.

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Main highlights

UV-C light filter 11 W for ponds up to 10,000 litres
Optical function control
Frees the water from algae, discolouration, germs and harmful bacteria
Dimensions: 335 x 230 x 185 mm
Branded UVC bulbs included (thus longer service life)

46,29 €
04

WAGNER GREEN Alles für den Gartenteich

UVC Pond Clarifier Disinfectant for Clear Water in the Pond Water Clarifier without Chemicals UV-C Algae Killer (7 Watt)

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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

Protects pool inhabitants from diseases and does not harm plants or fish
Optimises pond water in terms of germ-free and clarity
Includes light bulb and German Instruction manual
High-quality and durable workmanship
Controls algae, bacteria and mould formation without the use of chemicals
7 Watt UVC clarifier suitable for ponds up to 6,000 litres

39,79 €
05

Coospider

Aquarium U-V Filter Pump for 150-380L Fish Tank, 5W Lamp Anti Algae U-V Clarifier, 1200L/h Crystal Clear Algae Killer Water Pump Air Supply Flow Pump for Cold Water Tropical Fish

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9.1

Excellent

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Main highlights

【1 year after-sale service】We offer you a 4000 hour warranty and friendly customer service. If you are not satisfied with our machine in any way after receiving the aquarium pump, please contact the service mailbox on the package.
Separate switch: control the water pump and the aquarium light separately. If you only want to use the water pump, you can turn off the aquarium light separately.
Easy to check light up: you can easily check whether the light is switched on from the outside of the machine, do not need to disassemble the machine to see it.
Crystal clear: built-in 254 nm wavelength fish tank U-V light. It is used in green water aquariums. Make your aquarium crystal clear. It can reduce the number of tank water changes and you don't have to spend much effort to change the water.
Air supply and fresh smell: Once the aquarium is full of green algae, it is accompanied by the smell. This machine can reduce the smell in the aquarium and generate air bubble to add oxygen to your tank water. Simulation of the natural ecology environment.

39,99 €
06

SunSun

SunSun CUV-136 Pond Clarifier 4500 l/h / 36 W UVC Clarifier for Pond Filter & Pond Pump Water Clarifier with UV Lamp Light Filter for Algae Control

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9.0

Excellent

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Main highlights

[Effective Algae Control] - Reduces algae growth and effectively prevents the formation of bacteria and mould in pond water, improving water quality and ecosystem.
[Easy Integration] - Thanks to universal connections, effortless installation into any existing pond system is possible without additional complications or changes to the existing setup.
Reliable performance: ensures quick and efficient clarification of pond water to ensure clear vision and healthy water inhabitants.
Healthy pond environment: promotes a balanced ecological balance, which has a positive effect on the living conditions of fish, plants and other aquatic life.
Durable quality: high-quality materials and careful workmanship guarantee long-term and reliable performance, so you will enjoy your UVC pond clarifier for a long time.

67,99 €
07

Mauk

Mauk 673 Light Filter UV-C Algae Clarifier with Replacement Light Bulb 7 W

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8.7

Very Good

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Main highlights

The UV-C radiation breaks the cell nuclei of the pests so that they collapse and clump together. This allows the downstream filter to absorb the algae that were previously too small to be collected. The certain wavelength does not affect plants and animals. The effect is exclusively on floating algae, harmful bacteria and pathogens.
Technical details: - Power: 1,200 l/h - Max. Pressure: 0.3 bar - Max. Pond size: 6,000 L - Cable length: 4.8 m - Connections: 3/4 - 1 1/2 inch - Weight: 1.6 kg
Powerful UV-C tube with quartz glass coating for increased service life cleans up to 6,000 litres of water in the pond, fountain, aquarium or water system within just 14 days.
Ideal for cleaning ponds or aquariums, whether fresh or salt water, indoors or outdoors. With integrated automatic emergency stop
Easy and installation of the UV-C light filter. So your fish, crabs and other aquatic inhabitants stay healthy and live long.
100% chemical free: absolutely harmless to fish and plants in your pond. The effect is exclusively on floating algae, harmful bacteria and pathogens.

49,99 €
08

AquaOne

CUV-118 STERILIZZATORE PROFESSIONALE 20W CON LAMPADA GERMICIDA UVC DA 18W SUNSUN PER ACQUARIO DOLCE MARINO LAGHETTO FINO A 20000L

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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.

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OUTDOOR LIFE
CUV-118 Professional Steriliser 20 W with Germinating UVC Lamp DA 18 W Sunsun for South Sea Aquatic Water up to 20000 L
AquaOne

62,59 €
09

Forever Speed

Forever Speed 5-in-1 Aquarium Internal Filter with UVC Clarifier 8 Watt, Aquarium Filter Pump Including Adjustable Flow 650L/h for 100-300L Aquariums

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8.5

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

Suitable for fresh and salt water: the aquarium filter must be completely submerged in fresh and salt water. The design of the floor vacuum cleaner filters out impurities more thoroughly, and the slim inlet prevents fish from being sucked in so they are safe.
Low noise and easy to install: the aquarium filter pump is equipped with strong suction cups that can be attached anywhere under the water surface of the aquarium. The pure copper motor is more stable and safer in operation, with low noise level, it is the first choice for aquarium filter pumps at home.
Built-in UV cleaner: the aquarium filter is equipped with an 8 W UV cleaner that kills some micro-organisms, slows the growth of algae and inhibits the growth of viruses to achieve a healthy environment. The pump is with the UV timer you can choose 3 different times: 4 hours, 8 hours and 24 hours, depending on the water quality.
Adjustable flow rate/direction of the water outlet: the maximum flow rate of the built-in filter is 650L/H, and the size of the water outlet can be adjusted as needed, and the direction of the water outlet can be adjusted 180° left and right. The water outlet is equipped with a rain shower and an oxygen nozzle, which is decorative and practical.
5-in-1 multifunctional aquarium filter: the multifunctional aquarium inner filter, which combines circulation filtration, sterilisation, oxygen enrichment, rain shower and wave formation, can be used both as a filter for cleaning impurities in the aquarium and as an aquarium oxygen pump to increase oxygen in the water body and create a healthy environment for fish and aquatic plants.

29,99 €
10

Gardebruk

Gardebruk® Pond Clarifier 11 Watt 5 m Cable 3 Connection Adapters Garden Pond Aquarium UVC Clarifier Light Filter Water Clarifier Algae Killer Water Conditioner UV

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15% Off
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

Reduces the care effort – with the water conditioner, the maintenance effort for the pond and aquarium is considerably easier. The water remains clearer, which means less manual cleaning required.
Improves water quality – Our GARDEBRUK UVC pond clarifier uses UV light to kill harmful bacteria and algae in the water. This improves water quality and promotes the health of fish and plants.
Effective algae control – the water clarifier offers an effective method to combat algae growth in the pond or aquarium. By using UV light, the growth of algae is reduced without the use of harmful chemicals.
Easy and quick installation – thanks to the included connection adapter, the water clarifier can be easily mounted between pump and filter. The UV-C water clarifier is powered by a mains plug - plug in and you're done!
Durability and reliability: the UV aquarium and pond clarifier is very durable and reliable thanks to its robust material. In addition, it improves visibility in the long term and viewing the fish and plants becomes even more enjoyable.

45,00 € 52,95 €(15% Off off)