Product Review

Clear water is just a snap, converts most filters to UV filter; perfect for aquariums up to 20 ga. (80L)
no installation at all, simply clip to any waterfall Filter; UV bulbs lasts for 69 months (constant on), once your water is clear, there is no need to keep your UV on 24/7. This will help increase the life span of the UVA bulb; there is a green LED on the control box. If the LED is on, all is good. When the led is off, time to change the UV unit; sealed UV bulb design - avoid UV housing deteriorate over time, Fresh housing with every bulb change; ul & CUL listed (UL e-number: E335411 by ul@hk in 2014).