I just opened up my pool and I'm trying to do it myself for the first time. I got the cover off, plugs pulled out for the returns and skimmers, opened up all the pipes, but now when I try running my pump, I've got pressure. Water is sitting in the bottom of the pump, but it's not filling up that basket. I cleaned the skimmer and pump baskets, I tried opening up the air line on the filter. Anybody have any tips or ideas? My water level was a little high, so I'm dumping some water, but is there anything else I'm missing or not thinking about?