EZ-SPA OM IS: Clarifier, foam down, anti hardness scaling, water softener, relieves balance anxiety, sanitizer/shock, Ozone & mineral purifiers. I am not the scientist who made this stuff, but I know it works even with less dosing that it tells you to use. I use it in my own spa as well as many of my customers, we all agree it is just as its name says's EZ-SPA. Just start with EZ-Start by itself for 12 hours with fresh fill. Then use the EZ-Boost (Dichlor) and EZ-OM (shock) all directions are on the OM bottle, Then when needed balance your PH level.