Make sure your vacuum has below features in it.
No matter what the type is, your above ground pool vacuum needs to be easy to control. The easiest and the above the ground pool vacuums will ask you for nothing. If you are not comfy with the auto ones and like the ones that are handheld, make sure even the hand-handled ones are easy to move and clean.
The vacuum needs to be powerful enough to pull in the largest as well as the smallest of dirt and debris. You are going to have large leaves to sand to 0.2 microns algae in your pool. To clean it thoroughly, you need a vacuum with maximum suction power.
You need a proper-sized filter bag to collect as much dirt and debris as possible. It should be reusable and easy to clean too.
If your vacuum doesn’t reach the corners or can’t clean the tight spaces, then prefer not to invest in it. The ones we reviewed are all Pro in cleaning the toughest of spots.