I noticed that after a certain amount of time, like 1 day, my filter systems seem to "idle". It's still humming, and there's still water circulating through it, but it's not that strong. The first visible sign that it's what I call "idle" is that, if you look at the surface of the water, it's moving very little or not at all. The only way I've been able to "fix" it is to backwash, then it resumes full strength filtering/pumping.
Was wondering if this frequency of needing to backwash is normal, or perhaps characteristic of the lower HP pumps. I experienced this even with my 2nd brand new pump that I just bought two days ago (Hayward Powerflo LX, 1 Hp)