had the pool opened on monday. came home to find the water level below the skimmer, pump running, multiport valve in filter position. i turned off the pump filled the pool to proper level. the problem is i am not getting the filter basket to fill up to the top of the lexan cover. what i am trying to say is in past years with the pump running the water filled the basket to the top now i can see the water flow into the basket i spoke to the owner he suggested i backwash said no damage was done to the pump etc iwill back wash on thursday but today i put the polaris 360 in and iam not getting enough pressure to run it i have two returns when i ran the polaris in the past i kept one closed and the cleaner moved at a good pace now i have to close both to use it i have a vinyl liner pool, hayward de 3620 filter with a hayward 1.5 hp super pump iam in central jersey any help and advice would be much appreciated