I am new to the site and I Just bought a house that has a Salt Water System and I am getting a flashing red light system says Purifier off Check Flow! I am somewhat familiar with pools but this is my first experience with salt water setup. I called tech support and they said the tri-sensor or the board is bad. If it is the tri-sensor then I can handle that, if it is the board I will get a brand new system before I pay 500/600 bucks to fix it. Anyway, I pulled out the sensor and took pics. My question is do they salt sensors look normal and how can I tell if the sensor has gone bad? I am getting oooPPM and add 375lb of for the salt and no volts or amp readings. I have flushed the system already, so this is not a trash issue. Any advice will be greatly appreciated.