I think this is most probably the greatest tool in the ProfiLux's chest for savings anyones tank.
The GHL flow meter which can be programmed to turn off a failed pump and turn on a redundancy pump automatically, plus other great uses
This is why people that are serious about they're tanks use ProfiLux because it has the tools to reliably save your tank from crashes due to mechanical failures.
GHL ProfiLux remains the professional choice