Details of the "low tide method" of tank moving?

[Matt]

A 90 with 5 inches of water, a sand bed, and LR... likely weighs a bit more than 500 pounds. Add the effect of sloshing and weight transfer, and any one guy could wind up holding 200lbs or more. I wouldn't mind a short lift, down to a cart or moving blanket, but I wouldn't carry it far that way, unless you've got three very fit friends, with strong backs.