We all want safe crystal clear water to relax in, well by keeping on top of the water balance you can make it a whole lot easier. It is not just the pH you need to look after, the Total Alkalinity needs to be checked as well. pH is a measure of how acidic or how alkaline the water is. The ideal level for a hot tub is between 7.2 and 7.6 which is slightly alkaline as this helps to protect the equipment along with making it comfortable for bathers. If your pH is high you must add pH minus to bring the level down and if your pH is low you need to add pH plus to raise the pH.