PCB Main Printed Circuit Board for Aquarite. Main Printed Circuit Board. Use this PCB circuit board to make the Aquarite AQR salt power center current to revision 1.55. After installing this newer circuit board T-CELL-3 and T-CELL-9 salt cells can be used for pools under 40,000 gallons. DIMENSIONS: LENGTH: 6-1/2″ WIDTH: 5-3/8″.