We are getting ready to start on a new pool, and I needed some advice on pump and filter size. We are putting in an 18x40 vinyl liner rectangle pool. There is a possibility of having a cozy cove swimout with jets, but that is still up in the air. We are crunching numbers. There will be no other water features. We are not getting an automatic cleaner at this time, but I would like to get a robot later on. I have read on here that a 2 speed pump is the way to go, so I have been looking at those. With that pool size, would I want a 1.5 hp or 2hp? We were looking at a Hayward super pump 2 speed. Is that a good pump?
Also, are there advantages of going up to a 27" or 30" Hayward sand filter from a 24"? Thank you for your help!