I believe that the Ca reading is also false--if you'll search through the forum, there was a discussion a couple of years ago with another poster on the subject, and involved calls to customer support through the Lamotte supplier, and for some reason that Ca number was false, too. Do some searching and I will too, to see if I can come up with the link.

Otherwise your numbers look pretty good, if you can get that pH up a little!

Janet

Edit: here it is... http://www.poolforum.com/pf2/showthr...hlight=Lamotte