I also have an Arctic Spa complete with a Pioneer H2O Technologies Genesis unit. I constantly have to add PH down even with out adding any more water. I am still not convinced that the product is working correctly. I have adjusted all the levels to the dealer’s specification and had them tested. My aquachek test strips do not show any bromine, Arctic Spa tells me this is normal. Arctic Spa says "The bromine is there, you just can't read it." I added half a cup of boost yesterday to get my bromine to show up at a normal level on the test strip. What kind of readings are you getting and how are you measuring them? I am also confused what people mean when they say shock.... I have two products "BOOST" and “REFRESH". Is either of these products "SHOCK? I would also love to get any input as I hear many different stories and think the truth lies somewhere in the middle.