I had some issue stetting my FC up form the T15 cell. It was down to 0-1 today so I checked the cell again. It had some crust so I cleaned it again. This time a stronger solution sand it appears clean now.
I have it running at 100% to get the FC up ASAP as I have a pool party on Sunday. How long before it will get into the 4-5 range? The pump run 20 hrs a day.