Tested my water last night and FC was 12.5, CC was zero. Added 1.42 gallons of 6% bleach, which should bring FC up to 15. This morning the water was looking clearer. I can see the drain at the bottom of the deep end (~9'). I tested the water again and FC was 13.5, CC zero. I brushed again and there is still some residue (and of course the water is all cloudy again and I can't see the drain in the deep end any more). Does this mean that the algae isn't dead or that it isn't being filtered out? This is so frustrating. I don't seem to be making any progress despite high chlorine levels and running the filter 24/7. Please help!

I'd also appreciate an answer as to how often I should backwash during this process.

Finally, I'm having trouble updating my sig. My pool size is actually more like 34000 gallons and I am using a Taylor K2006 test kit.