I only turn off my reurn pump but leave my powerheads in the DT on. I wait u til everything has been eaten and enough time for the corals to eat and absorb the AB+ before turning back on the return. Otherwise half of the food would end up in a filter sockUsually 2 light feedings on weekdays … 3 on weekends and holidays! This might be another poll topic … but I throw Vortechs into feed mode and the fish all get into position for the feeding … I'm wondering how many bother to "reduce" pumps for feeding or just pour the goodies in at regular flow?