Follow up please! I had a long tentacle green carpet, but it didn't make it. It looked great for about 1 month, than down in flames. I have great water permas, peops on the board who know me can tell you that. I think they are really testy at first, Charlie knows best. I saw they have a sweet deal on a blue xl at reefhotspot.com today! Good luck, I agree with Charlie it can go south quick. Had one hit the main return pump and blew my PS in the sump, bad news to say the least.