I have given away all my books on basic aquarium setups, and now I'm ready to put sand and water in my new tank tomorrow. I don't know how many pounds of sand and gravel I need to get 2-3 inches. The new tank is 6 feet long by 30" wide. While I'm here any recomedations for a protein skimmer. The tank is 230 gal. I've been seeing the Turbofloter needle wheel hyped in the big supply store catalogs and was wondering if anybody had tried them.