I am a new member and a new pool owner. I recently got my pool up and running and took some samples to the pool store. After getting tired of the test strips I purchased a pool masters basic 5 test kit from the local pool store. There test results are different from what i am getting from the kit, and i am not sure which one to even believe anymore. There results were FC .09 CC 2.32 PH 7.4 TA 172 CH 420 CYA 4 and SI .7. At the same time My results were ph 7.2 TA 200 and FC 1. They said i needed to add more muriatic acid to bring the TA down which i agree, and also to add chlorine which i did as well. Well after 24 hours i tested and got a PH 7.0 Ta 180 and FC 3. Do I need a better test kit or to keep driving to the store to get this TA issue under control. Any help would be greatly appreciated. Thanks in advance