Sorry took so long to get back to you Brian, I was off-Forum for a bit.
Yes, break out the sock again and make sure you squeeze that sucker every chance you get.
You need to try and keep that FC higher than that.
Any time it slips below min FC value for your CYA level, algae it on the rise.
This is indicated by the CC being > 0.
You can raise it beyond recommended level (that is the mid point of range) just stay below Shock level.
Whatever it takes to make sure your FC never falls below min is where you need to be.