i use real ocean water and live in california but i get it from my LFS i pay $.75 a gallon they get it off of long beach some where ... im guessin it would be ok but i dont think you would get really clean water on the shore since most chemicals float atop the water and get washed ashore... i would think you would have to go out a little bit and get it there.... also i think the water would be too dirty from the waves kickin up sand and such...