I have a two speed pump on my 27' AGP and was wondering what speed ya'll set your pump at when backwashing? I see posts where I should be backwashing for like 3 minutes and wasn't sure if that was on high or low.
I run the stopwatch app on my phone while I backwash, but really only for reference and rinsing. The color/purity of the discharged water dictates how long I backflush. The last time I backwashed was the first time after adding DE. The water ran dirty for almost 4 minutes IIRC.