What defines a whirlpool foot spa?

A whirlpool foot spa is specifically defined as a basin that uses circulating water. This characteristic is key because the circulation helps to enhance the therapeutic effects of the foot spa, providing a more enjoyable and hygienic experience for clients. The movement of water not only facilitates the soaking process but can also aid in the distribution of any added products, such as salts or oils, which can enhance relaxation and foot care.

In the context of cosmetology practices, understanding the features of different types of foot spas is essential. The use of circulating water helps in maintaining cleanliness and hygiene, as it reduces the risk of bacteria buildup compared to stagnant water, which can harbor harmful pathogens. This distinction is particularly relevant to health and safety protocols that ensure client safety during pedicure services.

The other options describe different types of foot soaking systems but do not align with the specific definition of a whirlpool foot spa, which emphasizes the importance of water circulation in providing a quality service.