With a swimming pool your fundamental goal should be safety. So your best supplies should meet this goal, such as purifier, fencing, and life-saving equipment.
Sanitation supplies like chemicals and pumps are essential for the upkeep of a new pool. Items such as toys, cleaners, and safety equipment are also wise purchases for one opening a new pool.
It depends on what you are looking for the cover to do. Do you want a Solar cover, Heat Retention or debris. You can look at Plastica's website for more info
Since I don't think that is the answer you seek, I will share with you that I have a friend who had a salt water swimming pool put in her yard. She is a physical therapist who treats patients in a...