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.

Endless pool may refer to one of two things. For some, it’s a term used interchangeably with infinity pool. Because infinity pools don’t have a visible edge, they look endless. For others, it’s a brand of jetted lap pool. Endless pools are engineered to fit in small spaces, but provide the benefits of a full-sized pool (think: aquatic exercise or hydrotherapy). You can even use them indoors, and they’re relatively budget-friendly because of their small size.

Just like a traditional in-ground pool, semi-inground pools can be between three and eight feet deep. Lap pools, for example, are often an average of 4 feet deep, while a traditional pool may have both a shallow and deep end. The depth of your semi-inground pool depends on the liner you purchase, as well as how much excavation you plan to do before the installation.

Any number between 7.2 and 7.8 is an ideal pH for swimming pools or 80 to 120 ppm. Your pool testing kit should be able to measure both of these numbers. If your pool’s pH is below this range, the water is too acidic and can cause scaling and damage to pool equipment. If the water’s pH is above this range, it can decrease the effectiveness of necessary chemicals, like chlorine.