went to the LFS had them Test it, it came up close to what i got, closer to 1.0 though. anyway I got the prime and put in cap full, I also found out that my city does use what you where talking about to treat the water. How long does it take the prime to work? I am kind of getting off topic for this thread now lol... so to keep it on topic, will the prime kill the bacteria i introduced into the biospirra or effect it in anyway? when should my next water change be and should I add more biospira?