For the past several days I have been taking FC and CC values using the drop method, and I am showing zero for FC AND CC values. I have all green indicators on my IC40, and have pushed to 100% chlorine output with no change.
The odd thing is the pool continues to stay clear with no sign of algae.
I have thought perhaps my powder for testing values could be bad, so I tried the chlorine test that is in the opposite tube to the pH test, but still showing zero.
What is going on here that I can't get chlorine values?