Hello! Been reading through the forums for a while but this is my first thread. I'm looking to order an inground pool kit online within the upcoming months and have it installed (not by me.) I was looking on the Royal Pools website, and one thing I could not determine was how you know if a pump and filter will work together. I tried researching this online and am still confused! I know there is something with the diameter of the pump and filter (1.5", 2"?) where one has to be larger than the other, and something with GPM? I'm very confused! Looking at a 14x28 rectangle pool with a 42" shallow end and 6' deep end. Could anyone offer recommendations on how to pair a pump and a filter? Thanks!