I have a XF150 that is about 1" below the surface horizontally on one end of my 36" tank. It runs in pulse mode - about 10 seconds on/off at 60%. My tank is 98% SPS, but the LPS that are in there (Torch, Frogspawn, Pectinia, Open Brain) are in sheltered areas where they can deal with the flow. If I turn the Gyre off the LPS inflate more, but screw them, they are just LPS.
