Hi David,

If you want, you can connect a normal float switch to the ProfiLux by using the PLM-ADIN card and a breakout board. I have been using this method since day one and it continues to work well.
https://www.reef2reef.com/threads/be...-build.733996/

If you want to use a native GHL float, you can. You will however need to modify the skimmer lid to fit the sensor plug.