Coospider-Repta 2 Pack 18W UV Light Bulb Replacement for Pond Clarifier — 4-Pin Base

Upgrade your pond lighting with the Coospider-Repta 18W UV light bulb replacement. This two-pack UV-C bulb slides into many pond clarifiers with a 4-pin base and an 8.75-inch length, giving you a straightforward install. The UV peak at 253.7 nm paired with a high-transmission quartz tube is designed to support clearer water as water flows through the filter chamber.

Thanks to its universal replacement design, the bulb fits many popular brands such as AQUATOP, Jebo, Jebao, Tetra, SUNSUN, ViaAqua, Grech, and more. With a lifespan of over 8,000 hours, this bulb aims to reduce the frequency of replacements and simplify maintenance planning. For best results, replace every 8 to 10 months, depending on usage and environmental factors.

Key benefits at a glance

• Broad compatibility with common pond clarifiers for easier upgrades
• UV-C output at 253.7 nm to support a clearer water flow path
• Long-lasting performance to reduce maintenance cycles
• Two-pack value for stocking and seasonal changes

In real-world use, a backyard pond may benefit from clearer water during the warm season, while a small koi setup can benefit from consistent maintenance intervals. Picture a weekend pond check that reveals a crisper surface and more vibrant reflections, with fewer algae blooms as water passes through the UV stage.

Key specs and safety

• Power: 18W; length: 8.75 inches; base: 4-pin
• UV peak: 253.7 nm; quartz tube ensures optimum transmission
• Universal compatibility with major brands
• Lifespan: 8,000+ hours; replacement recommended every 8–10 months
• 180-day warranty; responsive customer service
• Ozone-free design; safety note: avoid direct eye exposure

Important safety note: UV-C light can be harmful with direct exposure, and this bulb emits short-wave radiation. Always follow installation instructions and handle bulbs with care.