Reliable, compact UV-C sterilizer for ponds and aquariums. The Classic 25W with 2" slip ports delivers proven water clarity and pathogen reduction in a service-friendly housing—great for polishing loops, QT systems, and modest displays.
Classic housing with 2" slip inlet/outlet for easy high-flow plumbing
Single low-pressure 25W UV-C lamp for algae/bacteria/protozoa control
Weather-resistant (non-submersible) body for indoor or protected outdoor installs
Clear end cap shows lamp-on status; quick access for lamp/sleeve changes
Optional “Wiper” variant available (not recommended for saltwater use)
Sterilizer (freshwater): ~500–1,200 gal
Sterilizer (saltwater): ~150 gal
Clarifier (freshwater): up to ~4,000 gal (with 50–75% plant coverage)
Target UV-dose flows (EOL):
~1,200 GPH ≈ 30,000 µW·s/cm² (max clarifying flow)
~800 GPH ≈ 45,000 µW·s/cm²
~600 GPH ≈ 60,000 µW·s/cm²
~480 GPH ≈ 75,000 µW·s/cm²
~400 GPH ≈ 90,000 µW·s/cm² (tighter pathogen control)
Model: Classic 25 Watt, 2" Inlet/Outlet, White (No Wiper)
MPN: A00025
Lamp: (1) × 25W low-pressure UV-C
Electrical: 120 V / 60 Hz; ~0.48 A
Connections: 2" slip (in/out)
Dimensions (unit): 20" × 3-3/4" × 6"
Cord Length: ~15 ft
Mounting: Wall/stand (use suitable brackets/anchors)
Warranty: Limited lifetime on housing; 1-year on other components
Classic 25W UV body (White, 2" ports)
(1) 25W UV lamp
Inline power supply
Union/fitting set (2" slip)
Quick start/installation guide
Plumb after mechanical filtration on a pressure line; avoid gravity-feed.
Add unions/valves for service and to set flow.
Protect from weather; do not submerge.
Replace the lamp every ~9–12 months of continuous use to maintain dose.