There are many Swimming Pool Accessories and will take too long to list all of them out here, i will list a few out to give you a rough idea of the essential things you can get. They vary between the ones you need ot maintain and keep your pool looking good and the fun stuff, like waterfalls, games etc.
Important Swimming Pool Accessories
This is a fantastic accessory that allows you to use the pool during those cold days and nights. Swimming around in a warmed pool is a fantastic feeling and its not something i can do without anymore
Another important peice of kit you should have is a pool chlorinator. It disperses chloring througout the pool over a period of time and keeps your pool safe and clean for use.
Fun Swimming Pool Accessories
What is a pool without a floating lounger to let you soak up the sun and enjoy the water as well. To me a lounger is one of the must have swimming pool accessories and ive spent hours floating around on reading and soaking up the sun.
Swimming Pool Slides
Having a slide is a must have if you have young kids who can really enjoy. It is a lot of fun and they will spend hours and hours on it.
These can be a little expensive and might not always go with the design of your pool but having one can will mean you can have that very relaxing sound of water all the time.
Two posts on either side of your swimming pool which lets you setup a net for various games like vollyball and the like.