Just converted to saltwater. Anyone have a Circupool SJ40? Installation went smoothly. Noticed on startup that the center plate (5 plates in the cell) vibrates slightly over the inlet side of the cell. It is situated over the "up tube" where the water enters the cell. Contacted manufacturer, still awaiting their response. Guess it might not matter as the cell have a 7 year pro-rated warranty. Just wondering if anyone else has noticed this.