I have searched everywhere and wondering what is the best placement for the 3 powerheads I have for my 155 Gallon Bowfront. I have a 50 gallon refugium and 2 AT Circulation Pumps (SubVortechs) and Sicce 4 Pump. These are placed if looking at aquarium at the side left pointing toward the front side right pointing toward the front and the Sicce is on the back wall pointing left toward the middle. I have a few areas of bare no sand, but these powerheads are not facing down toward the sand. You can see the glass at the bottom of the tank in these areas. Also seems to like too many particles are blowing around.