Liz, my K-3's have a concentrator on the end so I am not sure what you mean by "disperse". I have one at each end pointing at opposite sides. I am getting movement in softies that did not have any movement before. Some of my xenias seem to be getting pushed pretty hard but I think they will toughen up. At any rate, I am going to stick with this for a couple three days to see what happens.
I think Bill knows my tank almost as well as I do. That hints that I have been complaining WAY too much in the past.
Sarah, thanks again for all the coral I got the other day. They are starting to come around as they adapt to the lesser light of my T5's compared to your MH's.