What does this mean??

[poolmom06]

Went out and tested this dang water...
FC=5+
TC=5+
CC= 10+(?)
Ph-6.8
TA- 160
I don't have a test for CYA, so you're SOL!LOL!!
Anyway, it's a pretty cloudy blue this morning.
And yes I probably do have lot of an oxidizer considering I have used 7 bags of shock since Friday

[CarlD]

Can't be:

TC = FC + CC. That's always and forever.

If TC is 5 and FC is 5, CC MUST be 0.

[Sherra]

Sometimes when I'm testing mine will turn a white color first then another drop or two later it turns the "proper" color.