Just purchased the Intex Ultra XTR 12x24 rectangular pool and I have a question about starting up. The pools pump/filter came with 2 strainer grids which also had screws to assemble on the sides. According to the directions this seemed optional so I went ahead and screwed them in each strainer grid. Once I filled the pool and turned on the pump everything is working like it should except I'm not feeling any suction coming from either of the strainer grids. Do you think the screws had anything to do with it or could it be something else? Any help is much appreciated!