I dont know if I am being dim here or what but I have an issue with my vectra. In the past like everyone else I used to run my return pumps at a constant speed , I would set the flow to the sump and it would run near silent.
So now I have the vectra I wanted to drop the flow rate during the night, trouble is when i do the water is oviously dropping in the weir and gurgling, the same when i ramp the vectra up and it the goes down the overflow pipe.
I am now just running it at a constant speed, the only time it makes any real noise is when i go into feed mode.
Has anyone else have the problem, do you just run at a constant speed or do you do something different?