Hi Fish:
1) I would add a box of washing soda, with the filter running, wait an hour, then check pH again. Your pool MAY be 6.8, but it may lower and you won't know until it's 6.9 or better. If it's still below 6.8, put in a second box. wait an hour, and test. At this point I would switch to borax instead of washing soda..your TA should be fine by then.
2) DO NOT USE THE ALGaECIDE! It will only make more problems. The ONLY algaecide we ever suggest using is called Polyquat 60%. If it says "Poly....<something unpronounceable>.... 60%" and has no other active ingredient, that's the stuff. All other algaecides cause more trouble than they are worth. If you use PolyQuat, only use about 1-2 ounces a week--that's all
3) CC=.5 means .5 or less. It should be no problem, especially if your chlorine doesn't drop much overnight. If it does, raise the chlorine up to FC=15 and it should clear it.

Carl