Thanks for the response, the live rock is Fiji rock, the tank has been set up for about 7 months and is doing great, the lighting is the stock lighting and about the clam, I got it from my LFS ( JJ's Reef & Aquarium) located in Moses Lake Washington. The clam was turning white and losing its color, he gave it to me and I placed it towards the top of the aquarium and it has all of its color back and it is doing excellent. The live rock is in separate pieces, one large piece that weighs about 16 pounds and then some smaller pieces place under the large one, for a total of just about 31 pounds, and about the tang, I have a 55 gallon fish and live rock tank also, he is a small sailfin tang and I put him in the biocube to eat the algae, he loves it and his stomach is bulging, he will be going back to the larger tank soon. Thanks for the comments, and I will be watching for more.