Is there anyway I can use the logic functions within the Profilix 4 to set this up? I want my eheim jaeger heater, which is hooked up to switch socket 5, to shut off in the case that my GHL flow sensor reads zero flow. I want to do this because my heater is installed inline within a pvc contraption. Although I have recently redone my plumbing to make sure the heater doesnt run dry in this event, I dont want to risk heating the pvc pipe up to the point of it bending the pipe. Any experienced people with the GHL logic? I cant make heads or tails of it and the last time I went fiddling around I almost crashed my tank by overdosing alkalinity solution.