Hello, This is my first post to this forum. I have been using bleach for the last 3 years after finding this web site and haven't seen any algae in all this time, so I know that this system works. However, most everyone else I know that has a pool still uses trichlor as their main source of free chlorine. I just tested my son in laws pool as we are watching the dogs while they are out of town and I figured we would swim in it tomorrow. I use taylor chemicals for all my testing. I took a sample and went home to test it. The results have shocked me( no pun intended). I had to retest my own pool to make sure that there was nothing wrong with my test chemicals. FC .5 ppm, TA untestable as the 5 drops of indicator that is supposed to turn the water green actually turns red immediately, without adding any sulfuric acid. PH test is so low off scale it is also unreadable. the color is a pale yellow. CYA is 60. The pool is inground vinyl lined, However the water is clear as a bell. I will NOT be swimming in it tomorrow. None of this makes much sense, am I going crazy. Has anyone seen these kind of test numbers.