Restore the natural beauty of your pond with the Vorton UV Clarifier, delivering powerful UVC performance for ponds up to 18,500 litres. By using high-powered ultraviolet (UVC) bulbs, the Vorton works efficiently to eliminate green water algae and enhance water clarity—giving you a pond you can truly enjoy.
- Ideal for Large Ponds: Designed for use in ponds up to 18,500 litres, the Vorton provides powerful algae control for a wide range of pond sizes.
- Maximum UVC Efficiency: Equipped with high-output UVC bulbs, this unit delivers optimal ultraviolet light exposure to effectively destroy green water algae.
- Improves Water Clarity: Say goodbye to murky, pea-soup ponds—the Vorton helps create crystal-clear water, making your fish, plants, and pond features fully visible again.
- Combats Green Water at the Source: UVC technology targets microscopic algae that traditional filters can’t catch, preventing green water before it takes hold.
- Low Maintenance, High Reliability: Simple to install and easy to maintain, the Vorton is built for dependable performance season after season.
What Causes Green Water in Ponds?
Green water is caused by microscopic single-cell algae that thrive under certain conditions—particularly in warmer weather, sunlight, and nutrient-rich water. These tiny algae multiply rapidly, giving your pond a green, cloudy appearance and making it difficult to see fish, plants, or the pond bottom.
Unlike blanket weed (which forms long, stringy strands), green water algae are so small that standard pond filters can’t trap them. That’s why a UVC clarifier like the Vorton is essential—exposing the algae to ultraviolet light damages their cells, causing them to clump together so they can be filtered out or naturally break down in your pond.


How Do UVC Clarifiers Work in Ponds?
Ultraviolet clarifiers (UVCs) are one of the most effective tools for achieving clear, healthy pond water. As pond water flows through the UVC unit, it passes by a powerful UV lamp. The ultraviolet light damages the structure of green water algae, causing the microscopic cells to clump together. Once clumped, the algae can either be captured by the pond’s mechanical filter or sink to the bottom, helping restore water clarity.
You can expect to see visible improvements within just a few days, with full water clarity typically achieved in 6 to 8 weeks, depending on the pond size and conditions.
For flexible installation, a separate UVC unit can be easily connected to your existing pond setup, fitted into the hose run between your pond pump and filter.
Why Are Hozelock Cyprio UVCs So Effective?
Hozelock Cyprio UVCs are expertly engineered to deliver maximum UV performance and superior algae control. Here’s what sets them apart:
- Optimised Water Flow for Maximum Exposure: Water is carefully slowed down as it moves past the UV lamp, increasing the time it’s exposed to the ultraviolet light. This ensures greater penetration and more effective algae elimination.
- High-Quality Quartz Glass Tube: The UV lamp is protected by a quartz glass sleeve, which allows over 90% of UV rays to pass through. In comparison, standard glass blocks most UV light, significantly reducing effectiveness.
- Efficient Temperature Regulation: The UV lamp operates in a sealed chamber, maintaining the ideal operating temperature for consistent and efficient UV output.
- Maximised UV Contact: The design keeps the water as close as possible to the UV lamp, ensuring more algae cells are exposed to the ultraviolet light.
- Long-Lasting, High-Output UV Lamps: Fitted with single-ended UV lamps, which are known for their higher UV output and longer lifespan, giving you better performance and less maintenance over time.
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