I actually tested it two ways. Since I am new to this forum I don't yet have a Taylor Test Kit but will be ordering one on Friday. With that being said, The chlorine test after shocking with aquachem 6 way test strips showed FC at 1 and CC at 2. I then tested with a Test Kit that I got when the pool was installed July 2010. It is a JED Pool Tools Model 480 2way test kit that uses orthotolidine to test chlorine and phenol red to test ph. this kit only goes up to 4 on chlorine but it showed every bit of 4. So I researched the shelf life of orthotolidine and it says the shelf life is 3 years. So this test is possibly correct. Should I just trust that adding 6 Gallons brought my FC to 24PPM using the best guess chart and my current CYA level? I am ordering a better test kit Friday. I have 6 more gallons of chlorine waiting to go in as needed.