I have had the coralife 36 watt uv sterilizer for a year now and just was ready to replace uv bulb. I gave the housing a vinegar bath overnight and it was like brand new the only problem was that the chrome film inside the hosing that were the spiral camber goes into came apart so I ripped the rest of the film out of the unit. The unit works no problem ,but not having that reflective film will that reduce the effectiveness of the unit