Anyone have any idea how to program an optical sensor to stop my dos? It does a 2 gallon per day water change and the idea is the optical sensor will stop the DOS and hopefully text me when the water tub is full. I don’t see any programming in the DOS tile or the optical sensor. I’m sure I’m missing something here. The optical is plugged into an fmm that runs my ATO and I’m using a spare port for that optical sensor. Also the optical sensor is showing open when submerged....