I use Deep Ocean.... its dirt cheap and surisingly not that bad ($52 for a 150 gal mix, plus 20 percnt discount for me) , contrary to some belief. When it comes down to it, salt is salt sure one has more this, one more that, but realisticly with waterchanges I get my trace elements, and a nice Ca level of 450. Though when my never ending bucket diminishes I will go tropic marin. Why? Because I can.