A spa is little more than a pool of water that is kept at conditions that are therapeutic and beneficial to a human or even an animal. Without careful conditioning and maintenance, a spa is really only a collection of water. Keeping that water at correct temperatures, PH levels, and free from any bacteria or other harmful organisms gives you the true definition of a spa.
Spa maintenance can require any number of spa tools and accessories. Depending on the size, function, and use of the spa, the amount of chemicals and maintenance needed will change. For an athletic spa, that will see many users, chemical sanitation is of the utmost importance. careful monitoring of the chemicals is the only way to ensure that each guest of the spa is entering a clean and sanitized batch of water.