Just moved into a new house that has an above ground pool. The previous owners were using a service to maintain it and gave me their contact info. They have been to the house for a few days this week to get the pool in usable shape and was told the previous owners went about a month without having them come and put too many chlorine tabs in their floater. After dealing with this for my first week as a homeowner I now know I would like to follow the TFPC method and take on the pool care myself. I just bought a Taylor testing kit which is on its way. My question is, can I start testing and Adjusting using this method even if "pool store" chemicals may have been used? Any insight and help for a newbie would be appreciated.