lets see the tank is 18 inches tall, i have 2 inches of sand so about 16 inches to top of water. yes, i have lps. my bubble, lobo brain, and platygyra (maze brain) are doing fine. i just added a torch and a ancora. i have xenia and they love the light (double in size within 2 months. i have finger leather, which is also very happy (got from it for free from my office's tank). assorted zoanthids. and a monti cap, doing ok. it is hard to tell the monti is growing or not. i think my tank is LPS dominant. maybe i should try a birdnet. as for clam, i love the maxima.........but (light is an issue).