One way to keep the pH balance in your pool at the correct level is by using muriatic acid. While this type of acid, also known as hydrochloric acid, can be dangerous, it’s a welcome addition when treating your pool water, provided that you do it correctly and under the right circumstances. Fortunately, both determining whether your pool needs more acid and the process of adding the muriatic acid are easy to do. By following these steps, you can keep your pool in good working order with minimal effort.