Hey Kendall, Fresh Water has a Specific Gravity of 1.000 g/cc at sea level at 25 degrees Centigrade. The Specific Gravity of Sea Water at Sea Level at 25 degrees Centigrade is 1.025 g/cc. The SG of Sea Water continues to increase to a maximum of 1.028 g/cc at 1,000 Meters of sea depth. It stays at that measured density up to a measured 4,500 Meters. Therefore, your assertio that salt water is lighter than fresh water and one can retrieve salt free water by going below the salt water, uh, "Holds no water" shall we say?
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