{"product_id":"aqua-uv-classic-uv-sterilizer-white","title":"Aqua Ultraviolet Classic UV Sterilizer – White, 8 W to 240 W","description":"\u003cp\u003e\u003cstrong\u003eAqua Ultraviolet Classic\u003c\/strong\u003e is the ultraviolet sterilizer most serious koi keepers end up with. The housing is Teflon-coated for reflectivity, the ballast is external, and it runs a single pass of water past a high-output UV-C lamp to kill the free-floating algae spores that turn a pond green — plus the bacteria and parasite stages travelling with them.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eEvery wattage in this listing ships as a complete, ready-to-plumb unit\u003c\/strong\u003e — sterilizer housing with the quartz sleeve installed, the matched lamp or lamps, and the correct transformer. Nothing to buy separately to get it running.\u003c\/p\u003e\n\n\u003ch3\u003ePick your wattage\u003c\/h3\u003e\n\u003cp\u003eSize by pond volume using the freshwater column below, then check that your pump's actual flow is at or under the unit's max flow rate. If your pump pushes more than the unit can handle, tee off a bypass rather than sizing down.\u003c\/p\u003e\n\n\u003ctable\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n\u003cth\u003eWattage\u003c\/th\u003e\n\u003cth\u003ePond size, freshwater\u003c\/th\u003e\n\u003cth\u003eMax flow\u003c\/th\u003e\n\u003cth\u003eLamps\u003c\/th\u003e\n\u003cth\u003eInlet \/ outlet\u003c\/th\u003e\n\u003cth\u003eSaltwater\u003c\/th\u003e\n\u003cth\u003eUnit size\u003c\/th\u003e\n\u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003e8 W\u003c\/td\u003e\n\u003ctd\u003e5–200 gal\u003c\/td\u003e\n\u003ctd\u003e642 GPH\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003ctd\u003e3\/4\" or 2\"\u003c\/td\u003e\n\u003ctd\u003e70 gal\u003c\/td\u003e\n\u003ctd\u003e16\" × 3-3\/4\" × 6\"\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e15 W\u003c\/td\u003e\n\u003ctd\u003e200–500 gal\u003c\/td\u003e\n\u003ctd\u003e700 GPH\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003ctd\u003e3\/4\" or 2\"\u003c\/td\u003e\n\u003ctd\u003e75 gal\u003c\/td\u003e\n\u003ctd\u003e16\" × 3-3\/4\" × 6\"\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e25 W\u003c\/td\u003e\n\u003ctd\u003e500–1,200 gal\u003c\/td\u003e\n\u003ctd\u003e1,200 GPH\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003ctd\u003e3\/4\" or 2\"\u003c\/td\u003e\n\u003ctd\u003e150 gal\u003c\/td\u003e\n\u003ctd\u003e20\" × 3-3\/4\" × 6\"\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e40 W\u003c\/td\u003e\n\u003ctd\u003e1,200–2,000 gal\u003c\/td\u003e\n\u003ctd\u003e2,900 GPH\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003ctd\u003e3\/4\" or 2\"\u003c\/td\u003e\n\u003ctd\u003e325 gal\u003c\/td\u003e\n\u003ctd\u003e36-7\/8\" × 3-3\/4\" × 6\"\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e57 W\u003c\/td\u003e\n\u003ctd\u003e1,500–3,000 gal\u003c\/td\u003e\n\u003ctd\u003e3,200 GPH\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003ctd\u003e3\/4\" or 2\"\u003c\/td\u003e\n\u003ctd\u003e355 gal\u003c\/td\u003e\n\u003ctd\u003e20\" × 3-3\/4\" × 6\"\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e80 W\u003c\/td\u003e\n\u003ctd\u003e2,200–4,400 gal\u003c\/td\u003e\n\u003ctd\u003e3,678 GPH\u003c\/td\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003ctd\u003e2\" or 3\"\u003c\/td\u003e\n\u003ctd\u003e600 gal\u003c\/td\u003e\n\u003ctd\u003e36-7\/8\" × 3-3\/4\" × 16-1\/2\"\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e114 W\u003c\/td\u003e\n\u003ctd\u003e2,200–4,400 gal\u003c\/td\u003e\n\u003ctd\u003e3,900 GPH\u003c\/td\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003ctd\u003e3\/4\" or 2\"\u003c\/td\u003e\n\u003ctd\u003e700 gal\u003c\/td\u003e\n\u003ctd\u003e20\" × 3-3\/4\" × 16-1\/2\"\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e120 W\u003c\/td\u003e\n\u003ctd\u003e4,400–6,000 gal\u003c\/td\u003e\n\u003ctd\u003e4,080 GPH\u003c\/td\u003e\n\u003ctd\u003e3\u003c\/td\u003e\n\u003ctd\u003e2\"\u003c\/td\u003e\n\u003ctd\u003e900 gal\u003c\/td\u003e\n\u003ctd\u003e36-7\/8\" × 3-3\/4\" × 21-3\/8\"\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e160 W\u003c\/td\u003e\n\u003ctd\u003e6,000–8,500 gal\u003c\/td\u003e\n\u003ctd\u003e5,400 GPH\u003c\/td\u003e\n\u003ctd\u003e4\u003c\/td\u003e\n\u003ctd\u003e2\"\u003c\/td\u003e\n\u003ctd\u003e1,200 gal\u003c\/td\u003e\n\u003ctd\u003e36-7\/8\" × 8-5\/8\" × 17-1\/2\"\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e200 W\u003c\/td\u003e\n\u003ctd\u003e8,500–13,000 gal\u003c\/td\u003e\n\u003ctd\u003e6,600 GPH\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003ctd\u003e2\"\u003c\/td\u003e\n\u003ctd\u003e1,500 gal\u003c\/td\u003e\n\u003ctd\u003e36-7\/8\" × 8-5\/8\" × 22-1\/2\"\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e240 W\u003c\/td\u003e\n\u003ctd\u003e13,000–17,000 gal\u003c\/td\u003e\n\u003ctd\u003e7,200 GPH\u003c\/td\u003e\n\u003ctd\u003e6\u003c\/td\u003e\n\u003ctd\u003e2\"\u003c\/td\u003e\n\u003ctd\u003e1,800 gal\u003c\/td\u003e\n\u003ctd\u003e36-7\/8\" × 8-5\/8\" × 22-1\/2\"\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003cp\u003e\u003cstrong\u003eEvery flow rate above is calculated at the end of lamp life — 14 months.\u003c\/strong\u003e That is unusual and worth understanding: most manufacturers publish the numbers a brand-new lamp produces. These are the numbers you still get on the lamp's last day.\u003c\/p\u003e\n\n\u003ch3\u003eSterilizer duty or clarifier duty\u003c\/h3\u003e\n\u003cp\u003eThe same unit does both jobs; the difference is how much water you push through it.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAs a sterilizer\u003c\/strong\u003e — sized to the table above. You get genuinely clear water plus control of free-floating bacteria and parasite stages. This is what you want for a koi pond.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAs a clarifier\u003c\/strong\u003e — a higher flow rate through the same unit will handle a considerably larger pond, but it only knocks back algae. Expect the water to keep a green tint unless you also have 50–75% plant coverage or heavy shade.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eAqua UV expresses the dose ladder in µW\/cm²: the max flow in the table is the 30,000 µW\/cm² rate, and dropping to one third of that flow gets you 90,000 µW\/cm² for maximum kill.\u003c\/p\u003e\n\n\u003ch3\u003eInstalling it\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePlumb it after the filter, on the return line.\u003c\/strong\u003e Before the filter works, but you will wait 7–10 days for clear water instead of 3–5, and debris can crack the quartz sleeve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRun it continuously.\u003c\/strong\u003e UV has no residual effect — it only acts on water inside the chamber at that moment.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReplace the lamp every 14 months of continuous use.\u003c\/strong\u003e The lamp keeps glowing well past the point where its UV-C output has fallen off, so go by the calendar, not by whether it lights.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eElectrical:\u003c\/strong\u003e 120 V \/ 60 Hz standard. Draw runs from 0.48 A on the 8–57 W units up to 2.55 A on the 240 W. Cord is 15 ft on the 8–57 W, 8 ft on the 80–240 W.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eThings to know before you buy\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eYour biofilter is safe.\u003c\/strong\u003e UV kills bacteria drifting through the chamber, but the colonies living in your filter media and on pond surfaces never pass through it and are unaffected.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSwitch the UV off while medicating.\u003c\/strong\u003e Aqua UV's own instruction — UV radiation can degrade the treatment.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrain it completely for winter, or bring it indoors.\u003c\/strong\u003e Water left inside will freeze and crack the housing, and Aqua UV specifically excludes freeze damage from warranty.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNever look at a lit UV lamp outside the housing.\u003c\/strong\u003e UV-C causes severe eye and skin burns.\u003c\/li\u003e\n\u003cli\u003eWipers are available as a factory option, but Aqua UV does not recommend them for saltwater and using one there voids the warranty.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eParts and consumables for this unit\u003c\/h3\u003e\n\u003cp\u003eA UV sterilizer is not a fit-and-forget item — the lamp is a 14-month consumable and the quartz sleeve is a wear part. We stock the lot:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/aqua-uv-replacement-lamp\"\u003e\u003cstrong\u003eReplacement UV lamp\u003c\/strong\u003e\u003c\/a\u003e — 8 W to 57 W. The one you will buy again every 14 months.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/aqua-uv-quartz-sleeve-w-rubber-seal\"\u003e\u003cstrong\u003eQuartz sleeve with rubber seal\u003c\/strong\u003e\u003c\/a\u003e — 8 W to 57 W. Replace when cleaning no longer restores clarity.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/aqua-uv-quartz-rubber-seal\"\u003e\u003cstrong\u003eRubber seal for the quartz sleeve\u003c\/strong\u003e\u003c\/a\u003e (A40004) — the small purple one, on its own.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/aqua-uv-quartz-cap-white\"\u003e\u003cstrong\u003eQuartz cap with ring\u003c\/strong\u003e\u003c\/a\u003e (A40011) — the larger clear blue threaded cap. Easy to mix up with the seal above.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/aqua-uv-4-hole-lamp-end-connector\"\u003e\u003cstrong\u003e4-hole lamp end connector\u003c\/strong\u003e\u003c\/a\u003e (A40002).\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/aqua-uv-black-transformer\"\u003e\u003cstrong\u003eClassic replacement transformer\u003c\/strong\u003e\u003c\/a\u003e — 8 W to 57 W, 120 V. Also available as a \u003ca href=\"\/products\/aqua-uv-nema-transformer\"\u003eNema transformer\u003c\/a\u003e (40 W to 240 W) or a \u003ca href=\"\/products\/aqua-uv-raw-transformer\"\u003eraw transformer\u003c\/a\u003e (40 W, 57 W, 80 W).\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/aqua-uv-ez-twist-cap-top\"\u003e\u003cstrong\u003eEZ-Twist cap top\u003c\/strong\u003e\u003c\/a\u003e and \u003ca href=\"\/products\/aqua-uv-ez-twist-o-ring\"\u003e\u003cstrong\u003eEZ-Twist O-ring\u003c\/strong\u003e\u003c\/a\u003e.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003ca href=\"\/collections\/aqua-uv-parts\"\u003eBrowse all Aqua UV parts and accessories →\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eRunning an 80 W or larger?\u003c\/strong\u003e Those are multi-lamp units and the lamp and sleeve counts differ by model, so give us a call or send a photo of the label rather than ordering blind — we would rather get it right than have you ship a box back.\u003c\/p\u003e\n\n\u003ch3\u003eWhy buy from ChampKoi?\u003c\/h3\u003e\n\u003cp\u003eChampKoi has built and maintained koi ponds from our San Jose, California facility since 1998. We run Aqua UV on our own systems, we stock the replacement lamps, quartz sleeves and transformers, and we can tell you which wattage actually fits your pond rather than selling you the biggest one.\u003c\/p\u003e\n","brand":"Aqua UV","offers":[{"title":"8 Watt","offer_id":52715435393336,"sku":"UVAQ8","price":297.12,"currency_code":"USD","in_stock":false},{"title":"15 Watt","offer_id":52715435426104,"sku":"UVAQ15","price":326.43,"currency_code":"USD","in_stock":true},{"title":"25 Watt","offer_id":52715435458872,"sku":"UVAQ25","price":439.71,"currency_code":"USD","in_stock":true},{"title":"40 Watt","offer_id":52715435491640,"sku":"UVAQ40","price":625.36,"currency_code":"USD","in_stock":true},{"title":"57 Watt","offer_id":52715435524408,"sku":"UVAQ57","price":685.98,"currency_code":"USD","in_stock":true},{"title":"80 Watt","offer_id":52715435557176,"sku":"UVAQ80","price":1098.37,"currency_code":"USD","in_stock":true},{"title":"114 Watt","offer_id":52715435589944,"sku":"UVAQ114","price":1912.38,"currency_code":"USD","in_stock":true},{"title":"120 Watt","offer_id":52715435622712,"sku":"UVAQ120","price":1655.33,"currency_code":"USD","in_stock":true},{"title":"160 Watt","offer_id":52715435655480,"sku":"UVAQ160","price":2079.3,"currency_code":"USD","in_stock":true},{"title":"200 Watt","offer_id":52715435688248,"sku":"UVAQ200","price":2620.7,"currency_code":"USD","in_stock":true},{"title":"240 Watt","offer_id":52715435721016,"sku":"UVAQ240","price":3158.12,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0749\/6132\/2296\/products\/UVAQ8_0.jpg?v=1683000551","url":"https:\/\/www.champkoi.com\/products\/aqua-uv-classic-uv-sterilizer-white","provider":"Champion Nishikigoi","version":"1.0","type":"link"}