Animal-Chin said:Whats in the tank? Some coral love a good current some won't come out in it. I stuck my pump on the side wall of my aquarium and turned it on. then I'd move it until the current hit the right places and didn't directly hit stuff like my big torch coral that would shrink right up.
Play around and see how it goes....
(just don't aim it right at the sand or you'll make a big old mess.)