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  • Keep your aquarium crystal clear

  • Eliminate cloudiness

       * Controls Green Water

Turn Green water into Clear water in days with GKM!

Ultraviolet technology is a proven method that uses short wavelength ultraviolet (UVC) light to help reduce green water. Many drinking water systems use this technology.


The Green* Killing Machine (GKM) makes fighting green water easier as it is an internal UV - that is, a UV system that you simply drop into your tank for a full UV protection. In addition, the design of GKM allows it to be hidden behind ornaments or plants in your aquarium, eliminating potential leaks around your tank.


Other benefits of GKM by AA Aquarium:

  • 5-minute installation without any tools 

  • Our Sealed UV Bulb has water flow in direct contact with the UVC lamp for increased efficiency

  • 4 sizes that fit most aquariums:  3 Watt internal, 3 Watt Clip-On (treats up to 20 Ga. / 80L), 9 Watt (treats up to 50 Ga. / 200L) & 24 Watt (treats up to 120 Ga. / 450L). 

  • When choosing a UV for your aquarium always chose a SAFETY TESTED UV system. Water and electricity require great design. The GKM is the ONLY Internal UV System that is safety certified by Underwriters Laboratories (UL). Other units have NO US safety certifications.  DON’T RISK HARM TO YOUR FISH – use a certified-safe GKM.

  • 1 Year limited warranty against defects in materials or workmanship (except the UVC bulb)

  • Made in an EPA registered establishment.

* Controls Green Water

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