While you can install an above ground pool on most level surfaces, you’ll need sand to protect your liner from tearing. For example, rocks, plants, and twigs can take a toll on your liner. Adding sand will help level the pool even more. For additional support, you can also use angled foam or a foam pool cove.

When you’re winterizing your pool, you need to drain some of the water to prevent cracking and warping from ice. Nonetheless, you should never drain all of the water. Ideally, you’ll lower the water level to anywhere from four to six inches below the skimmer. This will protect the structural integrity of the walls, help prevent your pool liner from warping, and reduce damage from debris.

How often you should add water to your pool depends on how quickly the water evaporates. Keep an eye on your skimmer box, if you have one. Top up the water in your pool if you notice the water levels are lower than the bottom third of your skimmer. This helps prevent damage to your pump. 

Replace all the water in your pool every five to seven years, depending on how often you use your pool, the weather, and whether or not you close your pool for the winter.

Before deciding to install a swimming pool in your yard, there are many factors to consider. Even if you still need to figure out the specifics with your pool installer, having an idea of what you'd like will help the initial consultation. Some topics to consider include:

• Will you use salt water for your pool or traditional hose water?

• How big of a pool do you want to install? How deep?

• What special zoning laws do you need to follow for your area?

• Do you want to keep it simple or add special features like underwater lighting and waterfalls?