In order to prevent the pottery from being tossed about during surging storms, the pottery was anchored down by three, 150 lb. concrete blocks. Concrete weighs half as much in salt water as it does above water so we needed as much weight as possible to keep the pots from moving. Even 450 lbs. is no guarantee, but it should serve well. In this pic, you can see the sea grass bed behind me. I am very curious to see just what will make a home of these pots.