Sorry for the confusion. I checked the CYA again and it is 99%. I was thinking of the liquid muriatic acid that I bought, which is about 14-16%.
I added about 132oz of 6% bleach, which is too much for the CYA level that I will keep, but on the CYA bottle it says that the filter must be clean before you add CYA, and I did not have the time to do the full DE filter cleaning yet (read the article about that), so I know I will lose a lot of my chlorine level to the sun before I can clean the filter and get the CYA in there. (the pool/filter has sat dormant since at least Nov 2009 and looked pretty nasty when I opened it up, but it is only at 15psi, which I think is in the normal range.
The directions also said to pour the CYA powder right into the skimmer, but I learned on TFP that most people put it in a sock/stocking and hang it in front of the skimmer so it can dissolve slowly.
One more question: directions say to not add muriatic acid and bleach at the same time, but how long do I have to wait between adding one or the other? (TA was about 140 and pH was about 8.0)