Good morning Jim! We generally ramp-up the speed a little when adding chemicals (especially chlorine and muriatic acid) just to prevent them from settling on the pool surface and to let the moving stream of water from the return jets help take it out and away from where you are pouring. But it doesn't have to be on your highest rpm, nor does it have to run 30 minutes or more either. Once the acid or chlorine hits the water, it disperses quite quickly, so maybe about 5 minutes is all you need if that. Once back to the normal rpm, the chemical(s) will continue to circulate and disperse across the entire body of water, but the main concern for settling at the poured spot in long gone. Hope that helps.