On Thu, Jan 27, 2011 at 7:45 PM, Carl Denk wrote: > > Sand is approximately 130 lbs./cubic foot. Water is 62.4 lbs./cubic foot. I kind of figured sand would be heavier. The upside to water is that it could be easier to empty the containers and move them away. Downside might be if you didn't have a ready water source at your location. Josh --=20 A common mistake that people make when trying to design something completely foolproof is to underestimate the ingenuity of complete fools. =A0 =A0 =A0 =A0 -Douglas Adams --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .