UV blocker pond
Article no:
PL-7231
Product information "UV blocker pond"
sera Pond UV Blocker
The sera Pond UV Block er reduces the UV light transmission in the pond with concentrated humic acids. When used regularly, this ensures naturally clearer water, reduces green clouding and protects pond inhabitants through a shading effect - ideal in strong sunlight.
Highlights:
-
Reduces UV light transmission in pond water (humic acids)
Reduces turbidity / "green water" by shading out light
Inhibits excessive warming - especially in shallow water zones
Cares for sensitive fish mucous membranes thanks to natural humic substances
Suitable for koi, goldfish & native species
Strong sunlight can quickly become a problem in garden ponds: UV radiation promotes turbidity (e.g. greenish water due to floating algae), stresses fish and causes the water to heat up much faster - especially in shallow areas.
The sera Pond UV Blocker provides a natural remedy here. The concentrated humic acids/humic substances it contains reduce the UV light transmission of the pond water. This creates a shading effect that can contribute to natural clarification when used regularly. At the same time, the pond inhabitants benefit: the lower light input can reduce the stress level and the humic substances support the care of the sensitive mucous membranes.
Where is the UV blocker best used?
-
Ponds with full sun or little natural shade
-
Ponds with koi/goldfish or higher stocking levels
-
Natural and ornamental ponds in which you want to avoid chemical intervention as far as possible (maintenance support)
Application & dosage
Dosage: 50 ml per 1,000 liters of pond water.
Recommendation: dose weekly.
In case of very strong sunlight / high turbidity: increase dosage to 2× per week.
Application instructions:
-
Shake well before use.
Ensure even distribution (e.g. pre-dilute in a watering can or pour into the flow area). (Practical tip; manufacturer refers to "sufficient water movement" for distribution).
Range of the variants:
-
500 ml → up to 10,000 L
-
2.5 L → up to 50,000 L
Ingredients / active principle
-
Basis: Natural humic substances / (concentrated) humic acids
Effect: Light filtering/shading, thus less UV input, supports natural water clarification with regular use
Frequently asked questions:
Does the UV blocker turn the water brown?
Humic substances can give the water a slightly amber-colored, natural hue - similar to many natural waters. This is intentional because it filters out UV light. (Common humic substance effect; the "reduce UV light transmission" is the manufacturer's specification).
Can I use the UV Blocker together with UV-C clarifiers/filters?
Yes, it is generally common to use it with filter systems. UV Blocker works by filtering light in the water; filters then remove particles/clouding. (Combination note without hard manufacturer's exclusive claim.)
Which fish is itsuitable for?
For goldfish, koi and native fish species.
How quickly will I see an effect?
The product is designed for regular use and supports natural clarification. Visible changes depend heavily on sunlight, nutrient input and filtration.
Composition
Feeding recommendation
Technical details
Size information
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Customers also bought
New
UV blocker pond
From
CHF 14.90
sera Pond UV BlockerThe sera Pond UV Block er reduces the UV light transmission in the pond with concentrated humic acids. When used regularly, this ensures naturally clearer water, reduces green clouding and protects pond inhabitants through a shading effect - ideal in strong sunlight.Highlights:
Reduces UV light transmission in pond water (humic acids)Reduces turbidity / "green water" by shading out lightInhibits excessive warming - especially in shallow water zonesCares for sensitive fish mucous membranes thanks to natural humic substancesSuitable for koi, goldfish & native species Strong sunlight can quickly become a problem in garden ponds: UV radiation promotes turbidity (e.g. greenish water due to floating algae), stresses fish and causes the water to heat up much faster - especially in shallow areas.
The sera Pond UV Blocker provides a natural remedy here. The concentrated humic acids/humic substances it contains reduce the UV light transmission of the pond water. This creates a shading effect that can contribute to natural clarification when used regularly. At the same time, the pond inhabitants benefit: the lower light input can reduce the stress level and the humic substances support the care of the sensitive mucous membranes. Where is the UV blocker best used?
Ponds with full sun or little natural shade
Ponds with koi/goldfish or higher stocking levels
Natural and ornamental ponds in which you want to avoid chemical intervention as far as possible (maintenance support)Application & dosage
Dosage: 50 ml per 1,000 liters of pond water. Recommendation: dose weekly.
In case of very strong sunlight / high turbidity: increase dosage to 2× per week.Application instructions:
Shake well before use.Ensure even distribution (e.g. pre-dilute in a watering can or pour into the flow area). (Practical tip; manufacturer refers to "sufficient water movement" for distribution).
Range of the variants:
500 ml → up to 10,000 L
2.5 L → up to 50,000 LIngredients / active principle
Basis: Natural humic substances / (concentrated) humic acids
Effect: Light filtering/shading, thus less UV input, supports natural water clarification with regular useFrequently asked questions:Does the UV blocker turn the water brown?
Humic substances can give the water a slightly amber-colored, natural hue - similar to many natural waters. This is intentional because it filters out UV light. (Common humic substance effect; the "reduce UV light transmission" is the manufacturer's specification). Can I use the UV Blocker together with UV-C clarifiers/filters?
Yes, it is generally common to use it with filter systems. UV Blocker works by filtering light in the water; filters then remove particles/clouding. (Combination note without hard manufacturer's exclusive claim.)
Which fish is itsuitable for?For goldfish, koi and native fish species. How quickly will I see an effect?
The product is designed for regular use and supports natural clarification. Visible changes depend heavily on sunlight, nutrient input and filtration.
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Pond Sludge Remover
From
CHF 19.90
Pond Sludge Removerfrom Sera
Sera Pond Sludge Rem over is an effective water care product for the biological decomposition of pond sludge and organic deposits. It supports the natural self-cleaning of the garden pond, improves the water quality and ensures a healthy pond environment for fish and plants.
Product properties - at a glanceReduces pond sludge and organic depositsPromotes biodegradation through active bacteriaSustainably improves the water qualitySupports a stable biological balanceSuitable for garden ponds with fish stockingEasy to useFor clear and well-maintained ponds
Sera Pond Sludge Remover has been specially developed to break down sludge, mulm and organic residues in the pond in a natural way. Leaves, plant debris, food residues and fish droppings accumulate at the bottom of the pond over time and can impair the water quality.
The microorganisms contained accelerate the biodegradation of these deposits and relieve the pond ecosystem. This reduces oxygen depletion and improves the well-being of fish and plants.
The Sludge Remover is particularly suitable for use in spring and summer, but can also be used regularly during the pond season if required. A useful aid for a clean and healthy garden pond.
Zoo Roco tip
Vacuum off coarse deposits before use and ensure a good oxygen supply in the pond. The combination with pond aeration enhances the effect of the Sludge Remover.
Suggested products
New
UV blocker pond
From
CHF 14.90
sera Pond UV BlockerThe sera Pond UV Block er reduces the UV light transmission in the pond with concentrated humic acids. When used regularly, this ensures naturally clearer water, reduces green clouding and protects pond inhabitants through a shading effect - ideal in strong sunlight.Highlights:
Reduces UV light transmission in pond water (humic acids)Reduces turbidity / "green water" by shading out lightInhibits excessive warming - especially in shallow water zonesCares for sensitive fish mucous membranes thanks to natural humic substancesSuitable for koi, goldfish & native species Strong sunlight can quickly become a problem in garden ponds: UV radiation promotes turbidity (e.g. greenish water due to floating algae), stresses fish and causes the water to heat up much faster - especially in shallow areas.
The sera Pond UV Blocker provides a natural remedy here. The concentrated humic acids/humic substances it contains reduce the UV light transmission of the pond water. This creates a shading effect that can contribute to natural clarification when used regularly. At the same time, the pond inhabitants benefit: the lower light input can reduce the stress level and the humic substances support the care of the sensitive mucous membranes. Where is the UV blocker best used?
Ponds with full sun or little natural shade
Ponds with koi/goldfish or higher stocking levels
Natural and ornamental ponds in which you want to avoid chemical intervention as far as possible (maintenance support)Application & dosage
Dosage: 50 ml per 1,000 liters of pond water. Recommendation: dose weekly.
In case of very strong sunlight / high turbidity: increase dosage to 2× per week.Application instructions:
Shake well before use.Ensure even distribution (e.g. pre-dilute in a watering can or pour into the flow area). (Practical tip; manufacturer refers to "sufficient water movement" for distribution).
Range of the variants:
500 ml → up to 10,000 L
2.5 L → up to 50,000 LIngredients / active principle
Basis: Natural humic substances / (concentrated) humic acids
Effect: Light filtering/shading, thus less UV input, supports natural water clarification with regular useFrequently asked questions:Does the UV blocker turn the water brown?
Humic substances can give the water a slightly amber-colored, natural hue - similar to many natural waters. This is intentional because it filters out UV light. (Common humic substance effect; the "reduce UV light transmission" is the manufacturer's specification). Can I use the UV Blocker together with UV-C clarifiers/filters?
Yes, it is generally common to use it with filter systems. UV Blocker works by filtering light in the water; filters then remove particles/clouding. (Combination note without hard manufacturer's exclusive claim.)
Which fish is itsuitable for?For goldfish, koi and native fish species. How quickly will I see an effect?
The product is designed for regular use and supports natural clarification. Visible changes depend heavily on sunlight, nutrient input and filtration.
JBL AlgoPond Green
CHF 14.90
Litre :
250ml
JBL AlgoPond Green against floating algae
Water conditioner to combat floating algae in the garden pond
For water suitable for fish and plants: water conditioner to combat floating algae (green water) in the pond
Easy to use: Calculate the requirement, mix with pond water in a watering can, distribute evenly over the pond
Reliable and fast: attack and destruction of algae cells within a few days
Harmless to fish when used correctly
Dosage: 25 ml per approx. 1000 l of pond water
Biocide CHZN4473
Pond Sludge Remover
From
CHF 19.90
Pond Sludge Removerfrom Sera
Sera Pond Sludge Rem over is an effective water care product for the biological decomposition of pond sludge and organic deposits. It supports the natural self-cleaning of the garden pond, improves the water quality and ensures a healthy pond environment for fish and plants.
Product properties - at a glanceReduces pond sludge and organic depositsPromotes biodegradation through active bacteriaSustainably improves the water qualitySupports a stable biological balanceSuitable for garden ponds with fish stockingEasy to useFor clear and well-maintained ponds
Sera Pond Sludge Remover has been specially developed to break down sludge, mulm and organic residues in the pond in a natural way. Leaves, plant debris, food residues and fish droppings accumulate at the bottom of the pond over time and can impair the water quality.
The microorganisms contained accelerate the biodegradation of these deposits and relieve the pond ecosystem. This reduces oxygen depletion and improves the well-being of fish and plants.
The Sludge Remover is particularly suitable for use in spring and summer, but can also be used regularly during the pond season if required. A useful aid for a clean and healthy garden pond.
Zoo Roco tip
Vacuum off coarse deposits before use and ensure a good oxygen supply in the pond. The combination with pond aeration enhances the effect of the Sludge Remover.
Thread algae killer
From
CHF 20.50
Thread algae killer for garden ponds Söll Filamentous Algae Destroyer is the reliable solution for the targeted control of stubborn filamentous algae in garden ponds. With its unique active oxygen formula, the highly effective product removes filamentous algae quickly and sustainably - completely without copper and is gentle on fish, plants and the ecological balance.Contents: 250g for 8,000 liters or 500g for 16,000 liters
Active ingredient: Active oxygen (without copper)
Area of application: Garden ponds with fish and plants
Application: Sprinkle directly on algae, ideal in calm weather
✅ Visible success in a very short time
The filamentous algae dissolve just a few hours after application - without leaving any residue. The special formula ensures that dead algae residues are biodegraded and no nutrients are left behind.
✅ Safe for humans, animals and the environment
Söll Filamentous Algae Destroyer is copper-free and therefore harmless to fish, amphibians and aquatic plants. Ideal for near-natural and ecologically maintained ponds.
✅ Simple application - targeted effect
The granules are sprinkled directly onto the affected areas in the pond. The effect starts quickly and prevents the formation of new filamentous algae when used regularly.
Oase AlGo Universal - Algae Destroyer
CHF 32.90
AlGo Universal - Effective algae killer for crystal clear pond water - 500mlTargeted control of filamentous algae, smear algae & other types of algae - mostly used in summer.AlGo Universal is your reliable helper against the most common types of algae and ensures a clear, healthy pond. The algae killer covers the entire pond, even in hard-to-reach areas, and develops its full effect within two to three weeks.Advantages of AlGo Universal🌱 Gentle on plants & fish - Well tolerated when used properly⚡ Targeted effect - Also ideal for local algae problems, e.g. in streams🌊 Fast results - Effective algae control from the very first application💦 Suitable for swimming ponds - the active ingredient is also safe for bathing waterApplication instructions for the best results ✔ Remove algae mechanically in advance - Use the OASE EasyPick pond tongs, for example ✔ Increase the oxygen supply - Recommended: One OxyPlus application 24 hours after AlGo Universal ✔ Shake the product well - For even distribution in the waterStop algae growth now & get your pond in top form! 🔍 Included: KH quick test for safe application Use biocidal products with care. Always read the label and product information before use!Dosage: Add 50ml product to 1000 liters of pond water. Application: Dose the required amount according to the instructions in the cup provided. Then distribute evenly in the pond. Effective within 2 - 3 weeks. Remove dead algae. Switch off the UVC device for 7 days after use. After application with half dosage after approx. 4 weeks. After each algae control, nutrients are released which are ideally bound by products of category B. Store in a cool, dry and frost-free place.
Oase PhosLess Direct - Algae protection
CHF 29.90
PhosLess Direct - Natural algae protection & phosphate remover - 500mlEffective phosphate control for clear water and a healthy pond - for use in spring.PhosLess Direct reduces algae growth in a natural way by physically removing phosphate from the water - without any chemical additives. At the same time, it binds hydrogen sulphide, preventing unpleasant, foul odors. This makes PhosLess Direct perfect as a quick solution for acutely high phosphate levels or after algae treatment.Advantages of PhosLess Direct:✔ Fast action - Reduces phosphate levels below 0.035 mg/l, the critical limit for algae growth✔ Clear water quality - restores the natural nutrient balance in the pond✔ Effective & safe - Physically removes phosphate without harming the ecosystem ✔ O dour control - Binds hydrogen sulphide and prevents foul odours The best time to use PhosLess Direct🍃 Spring: Ideal for preventing algae problems during the pond season🌊 After algae treatment: Stabilizes the pond and prevents new algae blooms ⚡ In the event of acute phosphate excess: Immediate help for a healthy pond climatePhosLess Direct - The natural emergency brake against algae growth! 🌿💦Use biocidal products with care. Always read the label and product information before use!Dosage: 500 ml PhosLess Direct binds up to 110 g of phosphateApplication: Spread approx. 50 ml per 1000 liters evenly over the surface of the pond when there is no wind. Do not sprinkle directly on plants. Ensure sufficient mixing in the pond. The water will turn whitish to reddish in color while it is working. Throttle the filter system during application. Ensure sufficient aeration. If the water is clear again after approx. 24 hours, the settled active complex can be siphoned off or removed from the water. Remaining residues are harmless and store the phosphates sustainably. Depending on the nutrient load, top up every 6 - 8 weeks. In case of contact with eyes, rinse immediately with plenty of water and consult a doctor. Store in a dry place.
Oase AlGo Direct - filamentous algae destroyer
CHF 28.90
AlGo Direct - Precise & fast filamentous algae control - 600g
Summertime is algae time. If the green pests get out of hand, you should take countermeasures.AlGo Direct is the precise solution against filamentous algae, especially for locally infested areas such as streams, water features and bank zones. The highly active ingredient quickly kills the algae within a few hours and then breaks down into its natural components without leaving any residue. Thanks to this environmentally friendly formula, AlGo Direct is also suitable for swimming ponds.💧 Direct contact - immediate effect against filamentous algae⚡ Highly effective & targeted application - perfect for localized algae infestation🌊 For clear water - Supports water quality by quickly removing algae🌱 Residue-free & safe - active ingredient breaks down into natural componentsSafe & effective application ✔ At least 3 °dKH carbonate hardness required - Includes rapid KH test for optimum dosing✔ Simply apply specifically to affected areas ✔ Also suitable for bathing & swimming pondsCombat filamentous algae efficiently & precisely now! 🔍 Note: Use biocidal products with care. Always read the label & product information before use!Dosage: Add 60g (= approx. 50ml) of product to 1000 liters of pond water.Application: Switch off the pond pump if the water movement is too strong. Dose the required quantity according to the instructions in the cup supplied. Sprinkle evenly on the algae nests (Caution: Do not sprinkle on aquatic plants). Do not premix the product. Ensure a reaction time of 1 - 2 hours. Animals can remain in the pond. Repeat application with the same dosage after 3 days at the earliest if algae growth resumes. After each algae treatment, nutrients are released which are ideally bound by products of category B. Store in a cool, dry and frost-free place. Filling level technically limited.
%
Unipond Algae Killer Protect
CHF 34.50
CHF 42.90
(19.58% saved)
Algae killer Protect for garden and swimming pondsUnfortunately, Switzerland is no longer supplied
Helps against filamentous and smear algae
150 g for 10,000 liters
Quickly and reliably removes floating and filamentous algae in the garden pond
No foaming
Proven a thousand times over
Contains natural living microorganisms. 150 g of the granules are sufficient for a maximum of 10,000 liters of pond water. Use the appropriate dosage for other pond volumes and depending on the severity of the algae infestation. Use or sprinkle Algae Killer Protect according to the dosing instructions in the special fabric bag. Algae Killer Protect is a combination product for the effective control of floating and filamentous algae. The dead algae are decomposed by microorganisms. Algae decomposition requires oxygen, so ensure a sufficient supply of oxygen if fish are present. Switch off UV lamps during use. Labeling according to EU Directive 98/8 EC: Use algicides safely! Always read the label and product information before use! Contains: natural live nitrifying microorganisms and natural live denitrifying microorganisms (3x10h8 per g), 0.2 g terbutryn / per 150 g with trace elements; silicon, zeolite, calcium, magnesium, cobalt, etc.
Phosvec from Sera Pond
CHF 25.90
Sera pond Phosvec 500mlSera Pond Phosvec protects your garden pond from algae. It limits nutrients and is a nutrient competitor for algae. Sera Pond Phosvet binds phosphate immediately.Phosphate is the most important algae nutrient. In the garden pond, it accumulates quickly as a decomposition product. A massive and therefore dangerous increase in algae is then almost always the result.Sera pond Phosvec binds phosphate quickly, gently and permanently. The uncontrolled proliferation of disturbing algae is prevented right from the start and stopped in the long run by this effective, sustainable prophylaxis by means of nutrient limitation.500ml for 5000l garden pond
TetraPond AlgoClean 300ml
CHF 34.90
TetraPond AlgoClean 300ml - effective against filamentous algae
Works immediately against algae carpets.
Removes dense carpets of algae that often form at the edge of the pond or float as large mats on the water surface
acts immediately on contact
Cleans waterfalls and watercourses
Particularly easy to dose
Mode of action: active oxygen destroys the cell membrane of the algae. Even stubborn algae carpets disappear within 24-48 hours.
Not compatible with sturgeons
Sprinkle a thin layer of Tetra Pond AlgoClean evenly over areas with dense algae growth (maximum 50 g/1,000 litres). Use weekly in cases of heavy algae growth. Avoid direct contact with plants. After treatment, remove as much dead
TetraPond Phosphate Minus 250ml
CHF 16.90
TetraPond Phosphate Minus for 5000 litres of pond water
Removes the important algae nutrient phosphate from the water and thus contributes to the reduction of algae growth in the garden pond.
Reliable phosphate reduction leads to improved water quality
for naturally clear pond water
particularly environmentally friendly mode of action
Can be used all year round: At the start of the pond season before your fish are fed for the first time: to reduce the phosphate that has built up over the winter. During the pond season: supports the algae-inhibiting effect of underwater plants. At the end of the season after the last feeding of your fish: Reduction of the phosphate content in winter
particularly easy and precise to dose
TetraPond AlgoFin
CHF 18.90
Variant:
250ml - 5000 liters of pond water
|
Variant (1):
250ml - 5000 liters of pond water
TetraPond AlgoFin - filamentous algae killer
TetraPond AlgoFin - algaecide against stubborn filamentous algae and other algae in the garden pond
has an intensive effect on the most common types of algae, such as filamentous algae, floating algae and smear algae
Mode of action: Intervenes specifically in the organism and metabolism of the algae and thus inhibits their ability to photosynthesise
the special highly effective active ingredient unfolds its effect over a period of approx. 2-3 weeks
prevents further algae growth
safe effect
for permanent control of algae growth
compatible with aquatic plants, fish and microorganisms when used properly
Particularly easy and precise to dose
Ideal supplement for further algae prevention: Tetra Pond AlgoSchutz and Tetra Pond PhosphateMinus
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Medeka pond shell
CHF 65.00
SuperFish Medaka Bowl 600 - Mini pond bowl 36 lThe SuperFish Medaka Bowl 600 is a decorative mini pond bowl for the balcony, patio or garden. With approx. 36 liters and Ø 60 cm, it offers enough space for medaka (Japanese rice fish) and aquatic plants - ideal as a small biotope when space is limited.Advantages at a glance:
Japanese-stylemini pond for balconies, patios and gardens 36 l volume - compact but stable for small set-ups Generous: Ø 60 cm, H 25 cm Ideal for medaka and aquatic plants (shade, natural balance) Perfect for beginners: quick to set up, decorative and easy to care forWith the SuperFish Medaka Bowl 600, you get a beautifully shaped bowl to create your own aquatic biotope in a small space. The large diameter creates an attractive water surface that is particularly suitable for medaka and pond plants.
A good basis for a stable mini biotope
The bowl holds approx. 36 liters and measures Ø 60 cm with a height of 25 cm. This means it can be set up in a space-saving manner and still offers sufficient volume for small setups.
Tips for use:
Place the bowl on a level and stable surface (e.g. on a stone slab or solid base).
Plants (e.g. floating plants) provide shade and support a more balanced pond climate.
If fish are stocked or the location is very sunny, gentle aeration/filtering may be useful to keep the water quality stableFAQ
How big is the Medaka Bowl 600?
It holds approx. 36 liters and measures Ø 60 cm x H 25 cm. Is the bowl suitable for the balcony?
Yes, it is perfect for balconies and terraces. A stable, level surface is important. Do I need a filter?
Not necessarily. For fish stocking or very sunny locations, gentle aeration/filtering helps to keep the water quality stable.
Pond Sludge Remover
From
CHF 19.90
Pond Sludge Removerfrom Sera
Sera Pond Sludge Rem over is an effective water care product for the biological decomposition of pond sludge and organic deposits. It supports the natural self-cleaning of the garden pond, improves the water quality and ensures a healthy pond environment for fish and plants.
Product properties - at a glanceReduces pond sludge and organic depositsPromotes biodegradation through active bacteriaSustainably improves the water qualitySupports a stable biological balanceSuitable for garden ponds with fish stockingEasy to useFor clear and well-maintained ponds
Sera Pond Sludge Remover has been specially developed to break down sludge, mulm and organic residues in the pond in a natural way. Leaves, plant debris, food residues and fish droppings accumulate at the bottom of the pond over time and can impair the water quality.
The microorganisms contained accelerate the biodegradation of these deposits and relieve the pond ecosystem. This reduces oxygen depletion and improves the well-being of fish and plants.
The Sludge Remover is particularly suitable for use in spring and summer, but can also be used regularly during the pond season if required. A useful aid for a clean and healthy garden pond.
Zoo Roco tip
Vacuum off coarse deposits before use and ensure a good oxygen supply in the pond. The combination with pond aeration enhances the effect of the Sludge Remover.