No. Coralife's 18 W Turbo-Twist 6X has a 250 gal maker rating; Pentair's 18 W Smart UV has a 150 gal maker rating.
Follow your model's aquarium flow and installation instructions.
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With no preferences selected: AA Aquarium Green Killing Machine Internal UV is one option to compare. The first fit with a product link is OASE Vitronic UV Clarifier 18W.
Your choices are compared with each model’s product details. A missing or conflicting value stays unknown and cannot satisfy a choice you select. The starting order helps you browse; it does not rate real-world performance.
Source dates appear with each link below. A source date does not confirm today's price or stock.
Choose the installation before reading capacity claims
OASE Vitronic units have inline-pond descriptions, while AA Aquarium Green Killing Machine units use internal installation. Lifegard Aquatics Pro-MAX uses an inline description. Decide where the unit connects in your system before comparing a pond capacity with an aquarium rating; a large capacity figure cannot settle aquarium suitability.
Lamp power does not specify a treatment flow
Lamp ratings span 3 to 25 W. AA Aquarium’s Green Killing Machine supplies the 3 W endpoint and Lifegard Pro-MAX has a 25 W lamp. Installation, lamp and compatibility descriptions identify the UV units; treatment trials and UV-exposure measurements were not performed. Flow figures exist for 11 products, but they do not define an equivalent treatment result across makers. Use the chosen unit’s flow instructions for the intended treatment rather than calculating a setting from wattage.
Resolve water compatibility before switching a unit on
Freshwater-and-saltwater compatibility is unknown for 7 products. OASE Vitronic is not identified as compatible with both freshwater and saltwater, while Pro-MAX is. A blank provides no permission to use a unit in either environment. Follow the exact model’s water-compatibility and safe-operation instructions.
Before you buy
Can you use a pond capacity for an aquarium?
OASE's Vitronic 9 and Vitronic 18 are pond entries rated for 1,000 and 2,500 gal respectively. Do not apply those pond figures to an aquarium. The makers' tank ratings have no common measurement basis here, so equal watts or different capacities are no comparison of treatment performance. Use the exact maker's aquarium and water-type guidance.
Will a UV unit prevent fish disease?
There is no disease-prevention evidence, UV dose or contact-time calculation in this comparison. It cannot choose a disease treatment for your fish. Follow the maker's operating directions and seek your fish veterinarian's advice when disease is a concern.
Which units leave tank size or flow unclear?
Fluval UVC In-Line, both Hygger entries, JBJ Submariner and SunSun JUP-01 have no usable tank or flow figures. AA Aquarium's 3 W and 9 W units also lack both. OASE's ClearTronic has a tank rating but no flow value; its 7 W is lamp output. A missing flow figure cannot approve an installation or substitute for the model's flow guidance. No. Both Coralife Turbo-Twist 6X and Pentair Smart UV use 18 W; their maker tank ratings differ at 250 gal and 150 gal respectively. Coralife's 6X uses the combined inline-hang-on label. That label does not settle plumbing. Follow your model's aquarium flow and installation instructions.
