Those are our numbers.
We haven't received the reagent refills yet, but had enough to complete the test.

The 4.0 FC has just been burning off from the original 34+. I haven't added any chlorine as I thought a CYA of 78 would have kept the FC up. Apparently not.

The only thing I've added in the last 3-4 weeks is Borax to keep the pH right.

What FC am I shooting for shock? Higher than the original 34?
How much bleach should we add to get there from 4.0 given the approx. 5k gallons?