Is it harmful to your sand filter to backwash often, or backwash when chlorine levels are really high? There is a tree next to my pool that is dumping seeds and tiny leaves into my pool constantly, so I'm concerned that I won't be able to clear this pool up unless I vacuum once a day during the SLAM. I don't have a pool robot and I can't get these seeds and tiny leaves up with my net. I won't be vacuuming up anything large so I really don't want to vacuum to waste unless that is my safest option. I know that I need to backwash as soon as filter pressure have increased by 25%, but it hasn't reached that point yet.