Description
XFLO XFL3-40L-2 UV Sterilizer | 40 W Ultraviolet Reactor • 3″ Diameter Chamber • Professional Aquarium & Pond-Grade
The XFLO XFL3-40L-2 delivers high-performance UV-C sterilisation in a compact 3-inch diameter body, powered by a 40 watt lamp. Designed for aquariums, ponds and water-feature systems requiring robust microbial control, this model offers increased flow capacity and higher coverage than lower-wattage units—ideal when clarity, health and water quality are top priorities.
Key Features
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Efficient “L-shaped” flow path — engineered to reduce hydraulic “dead zones” inside the reactor so that water receives consistent exposure to the UV-C lamp.
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Unionised water ports (1.5″ for 3″ models) — simplifies plumbing installation and maintenance, allowing quick disassembly and re-connection without complex fittings.
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Single-ended lamp and quartz-sleeve access — lamp and sleeve can be serviced without dismantling the entire front end of the unit; streamlined for ease of maintenance.
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Tool-free, no-twist lamp cable fittings — prevents cable damage during servicing and reduces downtime.
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High-quality UV lamp and materials — Uses hard-quartz, non-ozone emitting UV lamps for long-life performance and minimal scaling on sleeves, preserving UV-C output.
Technical Specifications
| Specification | Value |
|---|---|
| Model | XFL3-40L-2 |
| Lamp Power | 40 W (single lamp) |
| Reactor Diameter | 3″ (≈ 76 mm) |
| Inlet/Outlet | 1.5″ union fittings |
| Flow Rate (30 mJ/cm²) | approx 1,020 GPH (~3,860 L/hr) |
| Flow Rate (180 mJ/cm²) | approx 168 GPH (~635 L/hr) |
| Recommended Aquarium Size* | ~150 gallons (~570 L) |
| Recommended Pond Size** | ~4,500 gallons (~17,000 L) |
* Based on 180 mJ/cm² dosage and one turnover per hour.
** Based on 30 mJ/cm² dosage and one turnover every ~3-4 hours.
Applications
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Medium to large aquariums requiring strong UV sterilisation for algae control, pathogens or clarity improvement.
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Outdoor ponds or water features with higher volumes and flow demands.
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Filtration systems or aquaculture setups where high-flow, chemical-free sterilisation is needed.
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Systems where ease of maintenance is a priority—especially those with frequent lamp or sleeve changes.
Benefits
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Superior water clarity & health — Reduces suspended algae, bacteria and other waterborne microorganisms, promoting clearer and safer water.
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Greater capacity — With the 40 W lamp and high flow ratings, this model supports larger systems than the lower-wattage 18 W or 25 W versions.
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User-friendly servicing — The unionised ports, single-ended access and tool-free cable make maintenance fast and straightforward.
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Durable, efficient design — Built by a design team with decades of experience, incorporating best-practice hydraulics and quality components.
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Chemical-free sterilisation — UV-C disinfection without adding chemicals or residuals means ideal for sensitive aquatic livestock or plants.
Installation & Maintenance Tips
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Always install after mechanical/biological filtration so the water entering the steriliser is as clear as possible—reducing particulates improves UV efficiency.
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Ensure that your flow through the unit stays within the recommended range (especially for higher UV dose requirements) because exceeding flow reduces contact time and effectiveness.
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Replace the UV lamp annually (or per manufacturer guidance) even if visible brightness seems fine—UV output declines over time.
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Clean the quartz sleeve periodically to remove scaling or film build-up which will reduce UV transmission.
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Make sure both unions are tight and leak-free; check for wear or seal damage each service interval.
For those aiming to run a high-capacity, professional-grade UV steriliser in their aquarium, pond or filtration system, the XFLO XFL3-40L-2 offers excellent performance, maintenance convenience and long-term reliability. If you’re looking for clear, healthy water and a strong UV dose in a compact footprint—this is a standout choice.