what setting do you put your sand filter on when vacuuming -- filter or waste? When using waste a lot of water is lost, but having it on filter when vacuuming causes...

when i add clarifier suds develope on the water surface. this never happened before. could i need new sand in my filter? i have above ground pool.

Our pool is circulating water with a lot of bubbles. Filter does not seem to be functioning to capacity. Cannot run automatic vacuuming system. Not enough pressure to...