What is a spa? Two main definitions of a spa exist. The main one, is locations where people use water which is rich in minerals for treatment purposes. On the other hand researchers have come up with another definition. The second definition is the most common in our day to day lives. This is where thermos heat from water is used in a bath tub. For this to be achieved in a bath tub the water must be kept at a constant thermos temperatures. This makes spa equipment very important. If you’re like to purchase professional spa equipment go here. The water which delivers thermos temperature is warm water. With the three main effects of water, heat, buoyancy and the massage effect health benefits are obtained.