Never Ending War on Algae

[Blueshell]

Put a handful of DE in the skimmer. Didn't appear to come back into the pool. Should I try it again at some point?

This mornings #'s:
FC-14.5
CC-0
PH-8
TA-140
CYA-40

I've been shocking the pool all week. There is less green for sure, but it's still there.

Beside bleaching out the liner, is there any other damage that will be done to the liner at these high FC levels?

I'll stay at it.

Sure appreciate your help!