The UV lamp is the heart of your Aqua Ultraviolet sterilizer. Over time, UV output degrades even when the bulb still appears to glow — most bulbs lose significant germicidal effectiveness after 12 months of continuous use. Replacing your lamp annually ensures your pond water stays crystal clear and your koi stay healthy.

Why Replace Your UV Lamp?

A worn UV lamp may look functional but can no longer produce the UV-C wavelengths needed to neutralize algae, bacteria, and pathogens. Don't wait for green water to tell you it's time — proactive replacement keeps your filtration system working at full strength.

Product Details

• Part Number: A20040
• Compatible Unit: Aqua Ultraviolet Classic 40-Watt UV Sterilizer
• Length: 33-3/8"
• Genuine Aqua Ultraviolet replacement lamp
• Recommended annual replacement for optimal UV-C output
• Easy drop-in replacement