I have the Maxspect gyre XF150 in my 150 gal. (48x30x24) and I really like it a lot. I found the reverse pattern to be worthless, so I just keep it at a steady state 24x7. I tried the pulse function for like a day until my wife sat down at the couch and asked what was making that pulsing sound. I'd be interested to see what a second gyre would do placed vertically on opposite corner of current horizontal one, but not enough to pony up the dough to really test it!