 Hmm that's weird. I didn't see your last post but did it ever work at all? If so did you see results? That's the same one that I have and even though I'm pushing it on its capacity (I have a 00g and it's rated for up to 00) it's cleared the tank better than I've ever seen it. I haven't had to change the bulb though obviously so I'm not sure how that will go. I read great reviews on it though so maybe call the company and see if they'll replace it or if they have any suggestions. Can't hurt to try! 