Note: This product DOES NOT include a filter

The Green Killing Machine 3W Clip-On UV System is for aquariums up to 20 gallons. Unlike the other Green Killing Machine UVs, this one does not have a integrated pump. It's designed to clip on to the waterfall output of a power filter. This is the easiest UV System on the market to install.

The Machine has a unique patented technology that allows the water flow to have direct contact with the UV lamp, making it extremely efficient. Keep your aquarium crystal clear & reduce water changes.

Features:

• Lasts for 6 to 9 months, assuming constant use. NOTE: The bulb can NOT be changed. You need to replace the entire unit. As long as the green LED on the control box is lit your UV is working properly. Once it turns off it is time to replace the unit.
  
• Once your water is clear, there is no need to keep your Mini Green Killing Machine UV System ON 24/7. This will help increase the life of your 3 Watt UV lamp
• UL listed
• Manufactured in EPA Est # 093568