Most people recommend 10-15X water turnover. So 270-405GPH is recommended for your tank. I would say you have the correct pump. The only thing different I would do would maybe instead of one 400GPH PH
, two 200GPH PH
's at opposite ends of the tank to create some better current.
Where does the PH
focus the water? The center of the front of the tank? Opposite side? Bottom/Top?
Also, most people would recommend not using crushed coral. It allows stuff to get stuck in beneath it and creates a nitrate problem if not vacuumed regularly. Since your just starting out, you might want to research using LS
instead and removing the CC