I don't expect to have to run it all that long, my pump runs 10hrs a day at low speed so I would like to keep the same schedule with the salt system...i'll run it at whatever level is necessary to fit that. I would think 50%-ish should be fine but who knows until I try it. I also only have a five-month season. As long as the cell lasts until it wears out and the controls last through a couple cells then i'm fine with that. But if I find myself replacing controls or the cell after a couple seasons because they just stop working, that will be the end of the salt adventure.