Evolution Aqua 25 Watt UV Clarifier for Ponds up to 5,300 Gallons

End Green Water for Good With the Evolution Aqua 25W UV Clarifier

Tired of staring at murky, green pond water that hides your fish and ruins the view? That cloudy tint comes from single-celled green algae multiplying out of control, and no amount of manual cleaning fixes it for long. This clarifier tackles the problem at its root, clearing the water and keeping it crystal clear so your pond looks its best all season long.

• Clears Green Water: Targets single-celled algae so your pond stays crystal clear instead of turning cloudy again
• Energy Efficient: High-output ballast delivers strong UV sterilization from the 25W bulb while keeping power use low
• Easy to Maintain: Bulb, quartz sleeve, and ballast can all be replaced quickly without a specialist
• Flexible Mounting: Universal mounting plates allow horizontal, vertical, or angled placement
• Simple Plumbing: Includes two 1 1/2" stepped, threaded hosetails, with 2" fittings available for hard pipe setups
• Pond Coverage: Suited to ponds up to 5,300 gallons with a flow rate of up to 2,500 GPH
• Guarantee: Protected by a 2-year guarantee for lasting peace of mind

How UV Clarification Clears Your Green Water

Green water refuses to disappear because algae reproduce faster than you can remove them. As pond water flows through the unit, UV light targets the free-floating algae directly, stopping them from multiplying and letting them clump together so your filter can catch them.

• Eradicates green water caused by single-celled green algae
• Prevents its return, so clarity lasts instead of coming and going
• Works alongside many different filtration systems
• Pairs with Evolution Aqua's pond filtration systems for the clearest, healthiest results

High Output Performance With Low Power Draw

Running a UV clarifier around the clock could send your energy bills climbing, but this one is built to keep costs down. The high-output, energy-efficient ballast pushes maximum UV sterilization out of the 25W bulb while sipping power, so you get strong clearing performance without the heavy running cost.

Fully Serviceable for Easy Maintenance

Keeping your clarifier in top shape shouldn't mean a trip to a specialist. Every part that wears is designed to come apart cleanly, making routine care a quick job you can handle yourself.

• Bulb replacements are quick and simple
• Quartz sleeve changes are straightforward
• Ballast replacements are hassle-free

Because the whole unit is serviceable, you replace only what needs replacing and keep it running for years.

Flexible Installation With the Evolution Aqua 25 Watt Pond UV Clarifier

Not every pond setup is the same, so this unit adapts to yours. Universal mounting plates let you fit it horizontally, vertically, or at an angle, matching your space and plumbing rather than forcing a single position.

Connecting it to your pond pump and filter is just as easy:

• Two 1 1/2" stepped, threaded hosetails come included for flexible hose use
• Prefer a permanent setup? Go with hard pipe installation instead
• 2" fittings can be glued onto the outside of the inlet or outlet to adapt to 2" pipe

Specifications and Sizing for the Evolution Aqua Pond UV Clarifier 25W

Matching the right clarifier to your pond makes all the difference. This 25W model handles ponds up to 5,300 gallons with a maximum flow rate of 2,500 GPH, making it a strong fit for medium to large ponds. The chart above shows where it sits within the full evoUV range — spanning the evo15, evo25, evo30, evo55, evo75, and evo110 models — with capacities and flow rates listed in litres, UK gallons, and US gallons, so you can confirm it suits your water volume and flow before you buy.

Backed by a 2-Year Guarantee for the Evolution Aqua 25 Watt UV Sterilizer

Buy with confidence knowing this clarifier is covered by a 2-year guarantee. That protection reflects its professional-quality build and gives you peace of mind that it will keep your pond clear for the long haul. With 59 units currently in stock, it's ready to ship. Have a question about your order? Contact Us and we'll help.

Product Specs