I posted about 10 days ago asking what experience people had with these. Based on the replys, I decided to buy one and ordered a Coralife Turbo Twist 3X 9W. It was the least expensive I found (usually not the smartest thing) and I have found Coralike products to be reliable. My son and I set it up on Sunday afternoon and I am happy to say that in just 24 hours, the water has become almost crystal clear. It is huge improvement over what I had. I am definitely impressed and excited that I can see everything in my tank again. Thanks to everyone who replied to the original post.