First off, I hope you have stopped using the pucks completely. The upside is that your CYA will not increase which means you won't need steadily increasing levels of chlorine to keep the pool safe and algae-free. The downside is that you need to test your water for FC more often because the only chlorine that will get in your pool is what you add with sodium hypo-chlorite or cal-hypo. Don't use too much cal-hypo as it can eventually cloud your pool.

In terms of FC, CC, and TC, it's just FC+CC=TC. You don't need to worry about TC. That is really just a test strip or pool store measurement. You want your CC to be no more than 0.5 because that's "used-up" FC.

As JimK and I said, you need to raise your FC to 20-22 and KEEP it there by testing and adding sodium hypochlorite as OFTEN as you can. You keep the FC that high until you pass the overnight test. Then you can return to normal FC levels which for your CYA level would be between 8-10.