|This is the 9th and final step in the construction process. Once the interior finish application is complete, we begin to fill your pool with water. Regular garden hoses are used to fill the pool and you will be informed on when the water should be turned off. There are different types of interior finishes available today and they range from exposed aggregate, pebble finishes, glass beads, and a multitude of tile finishes. Depending on your budget either finish will look great on your pool.