Welcome to our forum.
How about Vinegar. We use this for our dishwasher since our water is very hard here in Phoenix. We just fill a small glass and place it in the center during washing dishes..And cheap to.DickSemperFi
dumb question (?) - should we test the water with jets running, or take the sample with still water?this forum is great - much better info than many dealers and supply stores. (not knocking all dealers & suppliers, as I realize that many on this forum are those folks...)
Calcium hardness should run between 150 and 400 ppm. I keep mine at the 150 mark. My tap water runs about 50 ppm. I find no difference in my water at 50 or 150. I keep it at 150 only because it puts my water “in balance”.