Yea Palting I'll take my skimmer any day over performing 2 water changes a week just to keep my nitrates in check.
To the guy that said that the next wave will carry it right back out, that really isn't a valid statement as there is so much water volume crashing against the shore all around the globe and ocean that that miniscule amount that gets brought back isn't going to make a difference. I mean obviously the ocean does a pretty good job of filtering itself that way to have nearly undetectable nitrates around the globe, and the little teeny amount of nitrate that the ocean does have cannot be detected on a hobbyist test of any kind.
Those that think that a skimmer takes out lots of good stuff for their corals, I'll be glad to ship my next cupful of skimmate to you so you can dump it in your tank and feed your corals, free of charge and shipping payed by me.