I drained about 1/2 of the pool last night. I tested my numbers this morning and here's what I came up with:

FC=5.4 (Finally, this registers!)
CC= 0.4
TC=5.8
pH=7.2
TA=100
CYA=90 (This IS about 1/2 of what I was dealing with)

Should I shock the pool since I replaced water or just bring the chlorine level up to between 8-10 ppm???

I'm ashamed to admit I don't know more about taking care of a pool. This is the 5th season and I can't believe that it's taken this for me to become proactive in pool care. I just purchased the Taylor K2006 kit. What a difference this has made in how I take care of the pool--only had this a few days. Can I order the replacement reagents?