For me it depends. I have a automatic feeder and it feeds a little when I am not home so the pumps will be on. I feed a little pellet sometimes whan I get home and will shut off the return pump so the food dont go into m overflow as it is plumbed directly into my skimmer. Sometime I like to spot feed my corals so I will turn all pump off for that or I will just skim it all out.



