Everything You Need to Know About Vacuuming Your Pool ...
· Therefore, you will need to put your garden hose in your pool to fill it up as you vacuum, or add fresh water again after vacuuming. Otherwise, leave setting on "filter" and turn pump on to begin vacuuming. You will not lose water this way. Vacuum your pool just as you would vacuum your living room, picking up debris or algae as you go.