CUV‑503 – 3W UV-C lamp

The SunSun CUV-503 is an inline UV-C sterilizer for fishkeepers who want to reduce algae blooms, cloudy water and waterborne pathogens in aquariums of 30–100 L. It is designed to be fitted on the outlet hose of a bucket (canister) filter.

Why it matters

• The UV-C lamp is rated at 3 W and is intended to act on bacteria, viruses, algae, protozoa, parasites and larvae in the circulating water.
• The compact body, 22 cm long and 5 cm in diameter, allows installation inside any aquarium cabinet.
• Inlet, outlet and lamp sit in one straight line, so the unit does not restrict water flow or add load to the filter or pump.
• Connectors allow the lamp to be used as an internal filter with SunSun HQJ series pumps.

Specifications

• Dimensions: 22 cm length, 5 cm diameter
• Weight: 0.5 kg
• UV-C lamp power: 3 W
• Lamp life: up to 10,000 hours
• Hose connections: 16/22 mm, 20/24 mm, 20 mm, 25 mm
• Power cable length: 1.8 m
• Aquarium volume: 30–100 L
• Included: intake strainer, extension piece, bell-shaped intake with small holes that keep fish, shrimp, plants and other debris out of the lamp housing

What it works with

The CUV-503 is suited to freshwater aquariums of 30–100 L that run a bucket filter or an HQJ series pump. Because it is rated for that volume range and comes with its own intake strainer, it fits planted and fish-only tanks where the flow must pass through the sterilizer without interruption.