What are the first steps to opening an uncovered pool?

To open an uncovered pool, start by removing any debris, leaves, or dirt from the pool surface and surrounding area. Next, clean the pool walls and floor with a brush and vacuum. Then, fill the pool with water to the appropriate level, and check the water chemistry, adjusting pH and chlorine levels as needed. Finally, run the pool pump and filter system to circulate the water and ensure proper cleanliness.