Lighting Question

[reefy]

well what happend is that just took them out cuz I thought that causes my acropora to streess. I thought it had too much flow because my soft coral were swerving like crazy and my sand were flying everywhere eventhough I face my power throw the surface. one more question; How far can I face the powerhead directly to the coral? do they do well if I face it towards them?
sorry for all these question I am new in SPSs.
thanks in advance.