The bulb in my Coralife Turbo Twist (9W) went out. I may upgrade my tank from a 90 to a 180-210 next summer, so I think I'll go ahead and upgrade the UV sterilizer now.
I have the 25W version of this http://www.current-usa.com/gammauvaquarium.html">http://www.current-usa.com/gammauvaquarium.html</a> and I like it well enough. It uses a special single ended T5 bulb you can get on Ebay.
If I had it to do over again, I would have went with the 40W version.
I'm not sure how old it is. I've had it for about six months and I got it used. That's why I'm only asking $80.00 for it. I don't know how good the bulb is.