Hi all, I have an above ground pool 35,000 L, chlorine is added manually as no swg due to metal capping and timber deck. running a new viron variable speed pump and sand filter. I have just replaced sand in the filter as we had issues with small particles being returned to the pool when vacuuming. This is continuing to happen now even with new sand. I run the pump on medium speed for vacuuming and low speed for general filtering as high speed exceeds pressure rating recommended by filter manufacturer. I'm just wanting to know how to eliminate this issue so I don't have to always vacuum to waste and top up water each week. Any advice would be greatly appreciated. Cheers, Hag.