UV blocker pond

  • Without algicides (maintenance-supporting, light filtering)
  • For sunny ponds
  • Mucous membrane care through humic substances
Article no: PL-7231

CHF 14.90

Stock: 3

Available, delivery time: 1-3 days

Delivery between Friday, 21 August and Monday, 24 August
Litre
Zahlungsarten
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.



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8 May 2026 13:57

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OpenAir Vivarium PRO
Size (1): small | Size (4): small
OpenAir Vivarium - Gauze terrarium made of aluminium This open air gauze terrarium is perfect for species that need a lot of fresh air. It can be set up indoors or outdoors and has a transparent acrylic glass door Ideal for keeping reptiles outdoors Suitable for climbing species that need lots of fresh air Quick and easy to set up - and take down - without any tools Practical, light and handy With robust, rust-free aluminium gauze Transparent acrylic glass door Matching base tray optionally available Butterfly breeding also works perfectly in the Pop Up Vivarium and is an experience for young and old alike Available sizes:small 20 x 20 x 30 cmmedium: 42 x 42 x 66 cmlarge: 50 x 50 x 100 cmXL: 60 x 60 x 120 cm

CHF 59.90

Oase AlGo Direct - filamentous algae destroyer
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.

CHF 28.90

Pontec PondoPolar ice-free holder
Pontec PondoPolar ice-free holder Reliable protection against your pond freezing over completely The Pontec PondoPolar ice holder reliably prevents the water surface from freezing over completely, thus ensuring stable living conditions in the pond during the winter months. Even at temperatures as low as -10 °C, an open area remains in the ice, allowing vital gas exchange. Made from robust polystyrene, the ice freezer is ideal for year-round outdoor use. The integrated sinking chamber can be individually filled with sand so that the float can be optimally weighted and securely positioned in the pond. The ventilation slits ensure that harmful gases can escape and fresh air can enter - an important advantage for the health of all pond inhabitants. Product advantages of the PondoPolar ice-free holder: Ice freezer made from high-quality polystyrene Effective down to -10 °C Individually weightable lowering chamber Ventilation slots for essential gas exchange Easy handling and durable design Zoo Roco tip: Place the ice freezer early, before the first heavy frosts set in. This will ensure that the ice is permanently open and reliably protect your fish from oxygen deficiency and dangerous concentrations of foul gas.

CHF 19.50

Utricularia calycifida - carnivorous plant
Carnivorous plant - Utricularia calycifida supplied in an in-vitro cupHeight up to 15 cm for the adult plantFull sunlight to partial shadeHumidity: 70-80 %Temperature: 15-30 °C Flowers all year roundUtricularia calycifida is a carnivorous plant also known as physalis. This species is known for its unique trapping mechanism. Utricularia calycifida is a small plant that usually reaches a height of around 15 cm. The leaves are light green and the flowers are white with fine purple veins,the plant prefers a humid environment and should be watered regularly with distilled water. Size:Forms floating rosettes of leaves and upright flower stems. The plants can reach a height of 5 to 15 cm. Flowers: Delicate and attractive flowers, usually bright yellow to yellow-green in color. The flower stalk is upright, with several flowers along the stem.Light: Full sun to partial shade - requires at least 6 hours of direct sunlight per day.Substrate: A well-drained mix, often consisting of peat, perlite and sand.Feeding/fertilizing: Avoid fertilizing the substrate! The plant gets all the nutrients it needs from the prey it catches or eats.Humidity: The humidity should be between 80-90%. Temperature: Tolerates a wide range of temperatures, preferring a temperate to warm climate.Combining carnivorous plants with reptiles reptiles in a terrarium can create an aesthetically pleasing and ecologically interesting environment. Carnivorous plants such as Drosera, Nepenthes, Pinguicula and Sarracenia are not only exotic and beautiful, but they also they also contribute to a balanced ecosystem by controlling the population of small insects. small insects.

CHF 9.90