I tested the PH and chlorine with the old Pentair test kit that came with the house and Chlorine was zero and PH was higher than the test kit could even measure, i.e well over 8. I have a bottle of muriatic acid from when I cleaned my SWG and was wondering what the proper way is to reduce the PH in the pool. I have ordered a K-2006 test kit in Canada as suggested by others ($180 here!) but it wont arrive for weeks according to Amazon so its trial and error at this point. I have heard that if you add too much muriatic acid acid you can actually scale the pool so any input or advice is greatly appreciated.