Eheim Reeflex UV 800 Steriliser (E3723 350) – High-Efficiency 11W UV Clarifier

The Eheim Reeflex UV 800 Steriliser utilizes a patented internal aluminium reflector to deliver 1.8 times more effective UV-C sterilization than standard units, making it the ideal choice for crystal-clear water and pathogen control in freshwater and marine aquariums up to 800 liters.

Key Features & High-Efficiency Technology

1.8x Higher Efficiency: Built-in high-gloss aluminium reflector reflects UV-C light directly back into the water, achieving maximum sterilization efficiency with lower power consumption.
Direct-Flow Inner Chamber: Straight-through water path eliminates restricted, winding detours, preventing head-loss and maintaining maximum throughput from your filter pump.
Dual-Action Clarification & Sterilization: Rapidly destroys floating green algae spores, cloud-causing bacteria, and infectious parasite swarmers in their free-swimming stages.
AUTO-OFF Safety Cutout: Features an automatic safety shutoff mechanism that immediately turns off the UV-C bulb when opened to protect eyes and skin from harmful radiation.
Preserves Biological Filter: Only treats free-floating organisms passing through the tube, leaving beneficial nitrifying bacteria safe in your filter media and substrate.
Versatile Mounting: Includes a mounting bracket with flexible installation angles and multi-diameter hose taps (12/16 mm and 16/22 mm).

Technical Specifications

Model: Eheim Reeflex UV 800 (Art. No. 3723210 / E3723 350)
Recommended Tank Volume: 400 to 800 Liters (100 to 210 US Gallons)
UV-C Lamp Power: 11 Watts
Max Flow Rate (Clarification / Algae Reduction): 1,200 L/h
Max Flow Rate (Sterilization / Parasite Control): 600 L/h
Max Operating Pressure: 0.8 bar
Dimensions: 11.5 cm (W) x 13.0 cm (D) x 47.0 cm (H)
Hose Connection Sizes: 12/16 mm and 16/22 mm taps included
Compatibility: Fresh & Marine Water Aquariums

Frequently Asked Questions (FAQ)

Q: How does the Eheim Reeflex UV 800 differ from traditional UV sterilisers? A: Traditional UV sterilisers send water through complex, winding paths that restrict flow and only irradiate water from one side. Eheim's straight-through design prevents pump flow loss, while its internal aluminium reflector bounces UV-C light from all sides for 1.8x greater efficiency.

Q: Will this UV steriliser kill my beneficial nitrifying bacteria? A: No. Beneficial nitrifying bacteria live colonised on your filter media, rocks, and substrate. The Reeflex UV only irradiates free-floating microorganisms that pass directly through the water chamber.

Q: What flow rate should I run through the UV 800? A: For clearing green water and bacterial cloudiness, run up to 1,200 L/h. For targeted parasite control (such as Marine Ich or Velvet in their free-swimming stages), slow the flow rate down to 600 L/h to increase UV contact time.

Q: How often should the UV-C bulb be replaced? A: UV-C bulbs lose their germicidal effectiveness over time even if they remain illuminated. We recommend replacing the 11W UV bulb every 8,000 hours (approximately once per year of continuous use).

Recommended Complementary Products

Eheim Replacement UV-C Lamp 11W: Original Eheim replacement bulb to ensure your unit maintains maximum germicidal output year-round.
Eheim Professionel 4+ Canister Filter: The perfect inline mechanical and biological filtration companion to feed pre-filtered water into the Reeflex UV 800.

https://petstore.ae/collections/filters-media/products/external-canister-filter-eheim?_pos=2&_sid=6a5a7d902&_ss=r

Biozym N1 Nitrifying Bacteria: Use after installing a UV unit to keep your bio-filter strong while free-floating organic loads are reduced.
https://petstore.ae/products/biozym-n1-nitrification-bacteria-high-concentrate-beneficial-bacteria-for-freshwater-marine-aquariums?_pos=9&_sid=4a9171e75&_ss=r

Eheim Reeflex UV 800 Steriliser | 11W UV Clarifier for Aquariums

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