Hi!! its been awhile since i have had to post a question!! I am concerned that my TF-100 test kit may have gone bad, due to my hubby and/or kids leaving it outside in the heat!! And the crazy thing is, is that they don't even test the water!! Well, my daughter has gotten the hang of testing, but usually leaves that work up to me...lol!! Anyways.....I am testing my water right now and I haven't tested the CH in a long time on the account of having a vinyl pool, but just decided to test every aspect of the pool ( yes!!! i am actually bored!! ) Well, I followed the directions exactly testing the CH, but after I added the 5 drops of R-0011L, it is supposed to turn red if I have calcium, but it immediately turns blue!! I did the test twice, but just don't understand what happened. I have never had it turn straight to blue before. Is this wrong? Or what does this mean when it does not turn red first??