i used to use a 900l/hr wave maker for my tank. hi flowrate will not hurt the SH, but rather it will be an envoirnmental disadv to it. SH hunts for food in a slow n steady manner. having hi flowrate,1)the food will move away from it faster and they will not swim around much. 2) bcos its tail will just curl around anything, they may have their tail tangled in the wave maker.
on the other hand, i have a SH whom just loves the waves, it will just ride the wave going round n round my tank.
i have a sump too. the output from my reactor is used to circulate the water. ^_______^