yes i have a slat water running already, i have a perc clown, watchmen gobi, pistol shrimp, feather duster, 2 turbo snails, a few mushroom coral and one more coral that my gf put in that that i have no clue what it is (it has bright green blub tips connected to light brown finger looking thing) 2 live rocks and live sand. The tank is a ecplise 12 gal. My only concern is, i am afraid that the lighting is not good enough to keep these corals alive and i really would like to but a small anemone in there for my clown fish. But then i would be back to my lighting problem. I am also just using the standard filter that came with it.