Back when we had a pool I switched from those who installed it to dealing with Anders Pool in Huntsville. Not sure if they go that far, but I’d recommend them. Compared to where I had been getting pool stuff, they were more than reasonable. Cut opening costs by two thirds and maintenance was far cheaper. Had them install a salt water chlorine generator and costs went down more. Once we made the decision to change over to dirt, they even recommended a guy for that.