I've been daily testing FC using the r-0003 reagent and it continued to register way too low (around .5 to 1). So I continued to add bleach.
Then I tested using the powder/0871 and FC was high (30-40).
So I bought a new bottle of 0003 and the same thing is happening.
FC using 0003: 0
FC using powder: 4
What could be going on?
Could the powder have gone bad over the winter (it does freeze)?