{"product_id":"coospider-repta-aquarium-uv-light-18w-submersible-uv-c-clarifier-for-100-1000-gal-dual-tube-quartz-sleeve","title":"coospider-repta Aquarium UV Light 18W — Submersible UV-C Clarifier for 100–1000 gal, Dual-Tube Quartz Sleeve","description":"\u003cp\u003e\u003cstrong\u003ecoospider-repta 18W Aquarium UV Light is a submersible UV-C clarifier designed to reduce free-floating algae and suspended particles in ponds, pools, spas, cold plunge tubs, and large tanks from 100 to 1000 gallons.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eKeep water clearer and more visually appealing without chemical overdosing: this 18W UV clarifier uses dual-tube UV-C technology inside a high-transparency quartz sleeve, a weighted gravity block for stable sinking, and a long 17-foot cable to reach filters or deep pond locations. The unit is engineered for continuous or timed short runs, with multi-level sealing for underwater reliability and an expected service life of about 8,000 hours. Updated packaging and installation parts reduce breakage risk and make setup easier.\u003c\/p\u003e\n\n\u003ch3\u003eHow does this UV light help clear pond or tank water?\u003c\/h3\u003e\n\u003cp\u003eThe unit emits focused UV-C wavelengths that affect microorganisms and microalgae in the water column as they pass near the lamp, helping reduce green water and organic haze over repeated use. It’s not a filter replacement but complements mechanical and biological filtration to improve overall clarity.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eDual-tube UV-C design for more consistent output and longer, stable operation\u003c\/li\u003e\n  \u003cli\u003eHigh-transparency quartz glass improves UV penetration into surrounding water\u003c\/li\u003e\n  \u003cli\u003eBest used in line with pump flow or inside filter chambers for maximum contact\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhere and how should I install the 18W UV clarifier?\u003c\/h3\u003e\n\u003cp\u003eThe clarifier can be placed inside a pond filter, filter screen, large aquarium filter housing, or positioned directly in the pond where it will stay submerged. The included gravity block lets the unit rest on the pond bottom while the 17-foot cable reaches your power source safely.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eSubmerge in filter chamber or pond area with steady flow for continuous treatment\u003c\/li\u003e\n  \u003cli\u003eUse opaque boards in tanks to isolate UV exposure from fish light-sensitive areas\u003c\/li\u003e\n  \u003cli\u003eFollow the provided installation video and keep power source dry and protected\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow long and how often should I run the UV lamp?\u003c\/h3\u003e\n\u003cp\u003eRecommended daily use is typically 1–2 hours for maintenance in ponds and large tanks; heavier algae blooms may require longer or continuous running until clarity improves. Results depend on water volume, flow rate through the lamp area, and the overall filtration system.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eStart with 1–2 hours daily for maintenance in 100–1000 gallon systems\u003c\/li\u003e\n  \u003cli\u003eIncrease runtime during heavier algae outbreaks, then reduce after clarity returns\u003c\/li\u003e\n  \u003cli\u003eMonitor flow and lamp placement to ensure water passes near the quartz sleeve\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat safety and maintenance steps do I need to follow?\u003c\/h3\u003e\n\u003cp\u003eUV-C is harmful to skin and eyes; never operate the lamp outside its sealed sleeve or view it directly. The quartz sleeve should be kept clean to maintain UV efficiency, and seals inspected periodically to ensure waterproof integrity.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eAlways handle with power disconnected and keep out of reach of children\u003c\/li\u003e\n  \u003cli\u003eClean quartz sleeve periodically to prevent deposits that block UV transmission\u003c\/li\u003e\n  \u003cli\u003eReplace the UV tube near 8,000 hours of use and check seals for wear\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: The coospider-repta 18W UV Pond Light is aimed at pond keepers, koi owners, managers of larger aquariums, and anyone using cold plunge tubs, spas, or outdoor pools who wants to cut down on suspended algae and improve water clarity without relying solely on chemicals. It’s suited to systems with reliable circulation where a submersible lamp can be positioned near the water flow or inside filtration plumbing. If you need straightforward, supplemental water clarification for systems between roughly 100 and 1000 gallons and are comfortable with occasional lamp maintenance and safe handling, this unit provides a compact, installable solution backed by a one-year warranty and installation resources.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can this UV light be used directly in a koi pond?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes — place it in the pond filter or on the filter screen. Use 1–2 hours daily for maintenance and ensure stable water flow past the lamp.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: How often should the UV tube be replaced?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: The lamp life is about 8,000 hours; replace the tube near that mark or when water clarity no longer improves.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"coospider-repta","offers":[{"title":"Default Title","offer_id":56837739774292,"sku":"B0CZLJ3YSR","price":89.57,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1063\/2652\/4244\/files\/coospider-repta-front-view-with-packaging.jpg?v=1787060810","url":"https:\/\/gardenluxe.co.uk\/products\/coospider-repta-aquarium-uv-light-18w-submersible-uv-c-clarifier-for-100-1000-gal-dual-tube-quartz-sleeve","provider":"Gardenluxe Uk","version":"1.0","type":"link"}