“Love my S2 and the crystal clear water it helped me maintian this pool season!! I'm guessing it even SAVED me money over buying chemicals that I reall y did not need but the pool store would have tried to sell me if I needed to rely on them for testing. I wish the S2 had a way to allow me to do tests every other day which would in turn double the life of my 5 test cartiridges. I guess maybe I use the 5 test cartridge in the early pool season and then switch to a C2 when I have the hardness and other levels stable.”
