Blowing the Trumpet

Not sure what to do about the dang Trumpet coral.  It apparently really doesn't like the flow that the Koralia 240 puts out.  Whichever head was facing the direction the flow was coming from would shrivel and darken.  Rotating the coral would cause the affected head to puff back up, and whichever new head was facing that direction would start showing the same symptoms.

I tried turning the Koralia off for two days, and boy did that Trumpet look happy! Heads puffed up to almost double their previous size, color was great, everything.

Only problem with turning the 240 off (besides drastically decreased flow through the system) was that the flow from the return pump excavated a hand-sized hole in the sand, front and center, all the way down to the bottom of the tank.

Tonight I pushed the sand back into position and turned the Koralia back on.  All four of the Trumpet's heads immediately darkened and shrunk back to the skeleton.  Ugh.  I've tried moving it to a few different spots to see if I could find a more sheltered spot, but no joy.

240 off:

On: