I just watched this video, where they claim that running your pump for three one-hour cycles a day is as effective as running 8 hours. They say this is according to a study conducted by the Florida Atlantic University. Does anybody know the particulars?
It makes sense to me that intermittent cycles might allow reducing total filter time, since it takes some time for the water's movement to die down, but I'm not sure I buy the two-thirds reduction. Does anybody use a similar method? Is anybody experimenting?